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ASCEND
ASCEND IV is an object-oriented mathematical modeling environment, with similar functionality to programs such as GAMS, AMPL, Aspen, or Dymola. If can be used to solve difficult non-linear systems of equations and to plot dynamic behaviour of such systems. Although ASCEND has primarily been developed by Chemical Engineers, great care has been exercised to assure that it is domain independent. ASCEND can support modeling activities in fields from Architecture to (computational) Zoology.
ATK
'Accessibility' means enabling people with disabilities to participate in substantial life activities that include work and the use of services, products, and information. GNOME Accessibility is the suite of software services and support in GNOME that provides accessibility interfaces to other applications and toolkits.
ATLAS
ATLAS (Automatically Tuned Linear Algebra Software) is a system for generating high-performance mathematical libraries. It generates a library that is specifically tuned to your processor and compiler. ATLAS's purpose is to provide portably optimal linear algebra software. In particular, ATLAS provides ANSI C and Fortran 77 interfaces to the BLAS, and a subset of LAPACK.
ATM SAR Library (SARLib)
SARLib can be used as an AAL5 ATM Segmentation and Reassembly engine.
AVbin
AVbin is a thin wrapper around FFmpeg, providing binary compatibility for applications and languages that need it. FFmpeg is a collection of audio and video codecs widely used in projects such as mplayer, xine, gstreamer and VLC. It is under continuous development; so much so that its developers rarely provide a release, and SVN snapshots of the library must be statically linked to avoid version incompatibilities. AVbin allows programs that require dynamic linkage to use FFmpeg. It does this by providing:
  • an accurate version number within the shared library, allowing applications to select the appropriate data structures and functions to use at runtime, and
  • a simplified interface with an unchanging ABI to the most common decoding functionality within FFmpeg.
  • AVbin is distributed as a single dynamic library (.so on GNU/Linux, .dylib on Mac OS X, and .dll on Windows) that depends on no other files or installations. This eliminates the many complexities of building FFmpeg on platforms other than GNU/Linux; however you can still build it from source if you prefer.
Aalib
'Aalib' is a low level gfx library that works on any kind of terminal. It does not require graphics devices (in fact, no graphical output is possible), and is particularly useful for those with older hardware who do not want to worry about overloading their systems with graphical applications.
Aapl
This is a candidate for deletion: 1. Cannot download files: Reference:
http://web.archive.org/web/20060226235310/http://www.elude.ca/aapl/
http://web.archive.org/web/*/http://www.elude.ca/aapl/*
http://web.archive.org/web/20060925174123/http://www.cs.queensu.ca/home/thurston/
http://www.colm.net/
https://tracker.debian.org/pkg/ragel
ragel -> aapl part of text: This directory contains the Aapl source distribution. For the documentation, build scripts, test programs, ChangeLog, etc. get the aapldev package.
Adrian Thurston <thurston@colm.net>
Aapl is a C++ template library for generic programming. It contains Linked List, Avl Tree, Vector, Binary Search Table, Double Ended Queue, and Merge Sort. The library is designed to be versatile for the programmer. For example, the linked list utilizes both inheritance and templates to allow a single instance of a data structure to be an element in multiple lists. In general, Aapl data structures do not have private data members and are thus not abstracted away.
Abclock
'abclock' gives a spatial representation of time. It isn't tied to the design of a mechanical clock, but instead uses the natural properties of bitmaps: straight lines and rectangles. The clock uses ordinary hours and minutes. Placement and movement of objects is analogous to mechanical clocks. Time has a symmetrical property that is reflected in the way time changes in this clock. It is clear and exact up to parts of minutes, even when the bitmap is very small.
Achievo ATK
Achievo ATK is an object oriented Web-application Framework, written in PHP. It is targeted at developers who wish to focus on business logic, instead of coding HTML. Where other application frameworks mainly provide a large set of utility classes, ATK provides a complete framework that requires only small amounts of code to get usable applications, while maintaining full flexibility. It is currently the back-end software for the 'achievo' project management/project tracking tool.
Ad-hoc Support Library
Ad-hoc Support Library (ASL) is a user-space library which provides an API to faciliate implementation of routing protocols for wireless ad-hoc networks in GNU/Linux.
Ada Components
A component library for the Ada language. The four main categories are data structures, math, Ada programming tools, and OS interface.
Ada Motif binding library
SERC's Ada/Motif is a complete binding to X Windows and OSF/Motif for the Ada programming language it was based in part upon the SAIC/Unisys (STARS) public-domain bindings it incorporates many of the bug fixes and additional capabilities beyond the public-domain releases in Ada/Motif. Most noteworthy are the capabilities included in Ada/Motif for Ada tasking, callback registration, memory leak detection/prevention and capabilities for developing customized widgets. Paramax/STARS considers Ada/Motif to be the commercial version of their STARS bindings, according to SERC.
AdaSockets
'AdaSockets' is a library that lets you use sockets in Ada 95. It supports unicast and multicast sockets, and uses object oriented structures to ease sockets manipulation.
AdaUnits
'AdaUnits' provides an implementation of dimensioned values for Ada. Unit checks are made at run-time, if not optimized out by the compiler. The package supports SI and irregular measurement units and shifted units (like degrees Celsius). Conversions from and back to strings are provided for all various irregular units.
Adns Heckert gnu.tiny.png
GNU adns is a C library that provides easy-to-use DNS resolution functionality. The library is asynchronous, allowing several concurrent calls. The package also includes several command-line utilities for use in scripts.
Aften
Aften is a simple A/52 (AC-3) audio encoder based on the FFMpeg libraries. The name is an acronym for A/Fifty-Two ENcoder. It is also Danish and Norwegian word for 'evening'. It is able to create stereo and multi-channel AC3-compatible audio streams.
Ags
Advanced GTK+ Sequencer (AGS) is intended to use for music composition. It features a piano roll, as well a synth, matrix editor, drum machine, soundfont2 player, mixer and an output panel. Further it has LADSPA, DSSI and Lv2 plugin support. It's designed to be highly configurable. You may add effects to its effect chain; and add or remove audio channels/pads. You may set up a fully functional network of engines, thus there is a link editor for linking audio lines. AGS requires a realtime kernel and ALSA support. AGS uses conditional locks to keep several threads in sync that's why you need at least a preemptable kernel. LADSPA support has been added to version 0.4.2 as well export to WAV. Version 0.5.x brings you first concurrent audio tree processing support. Version 0.6.x is dedicated to accessibility. You might control GSequencer by keyboard. As you move to a note it provides you an audible feedback. Version 0.7.x gives you the benefit of providing the libraries libags, libags-thread, libags-server, libags-audio and libgsequencer. It contains for now an automation editor. Open Sound System (OSS4) and JACK Audio Connection Kit support has been added recently. Now you may configure multiple soundcards. Since 0.7.111 there is MIDI input available. Let you record your MIDI instrument and doing live performance. Version 0.8.x extended MIDI support to import/export SMF. A built-in envelope editor and additional editing functionality like move/crop selected notes.
Airhook
Airhook is a reliable data delivery protocol, like TCP. Unlike TCP, Airhook gracefully handles intermittent, unreliable, or delayed networks. Other features include session recovery, queue control, and delivery status notification. Airhook is useful for keeping connections running over bad wireless networks (like CDPD), intermittent dial-up connections, and any other network that doesn't work very well. The implementation includes a TCP proxy (so you can use HTTP, SSH, etc.) and a protocol library for applications that want more control (real-time media delivery, games, etc).
Aisleriot
Aisleriot is a suite of Solitaire card games which are easy to play with the aid of a mouse. This package includes popular variants such as spider, freecell, klondike, thirteen (pyramid), yukon, canfield and many more.
Alchemist
This package provides a functional, Ruby Domain-Specific Language (DSL) for casting, transforming and transposing objects. The project's README file provides the following explanation of the purpose of this library:

Rationale


Casting complex objects from one type to another can be an uncomfortable process to express well. Objects that we use on a daily basis are not always in our control, and, even when they are, some don't lend themselves to simple construction. Remote service communication objects or complex data structures from libraries we use in our applications can result in large piles of casting code.

This circumstance often produces large swaths of procedural code, even if split up into separate function calls. This code can be not only difficult to understand, but difficult to test if an object requires a great deal of set up. Field or method assignments midway through can change and break the entire operation.

The goal of this project is to provide a method of defining easily digestible specifications for object translation that are also easily testable and changeable. The project focuses on writing specifications for transformations and not doing direct mutation in the recipes. The result is something that should seem somewhat functional, but also exceedingly separable.

Aletheia
In short, Aletheia is software for getting science published and into the hands of everyone, for free. It's a decentralised and distributed database used as a publishing platform for scientific research. So, Aletheia is software. But software without people is nothing. To comprehensively answer the question what is Aletheia, Aletheia is software surrounded by a community of people who want to change the world through open access to scientific knowledge. For a more in depth explanation, Aletheia is an Ethereum Blockchain application utilising IPFS for decentralised storage that anyone can upload documents to, download documents from, that also handles the academic peer review process. The application runs on individual PCs, all forming part of the IPFS database. This gives us an open source platform that cannot be bought out by the large publishers (and any derivitive works must also be open source) that should also be hard to take down due to the database being spread across the globe in multiple legal jurisdictions. Aletheia is designed to be a resilient platform run transparently by the community, not some black box corporation or editorial board, meaning all users can see the decisions Aletheia is making and have a stake in that decision making process if they so desire. By this nature, Aletheia is decentralised, it has no key person risk. Should the core group who invented Aletheia dissapear Aletheia won't cease to exist, it will continue to be run by the community. The community moderates content through various mechanisms (peer review, reputation scores etc.,) to ensure quality of content.
Alexis FTP (aftp)
aftp is an FTP library and a background FTP tool. The aftp tool is a good example on how to use the library. You need FTP functionality in your software? Use the aftp library!
Algart
AlgART are free software Java libraries, supporting generalized smart arrays and matrices with elements of any types (1 bit, 8/16/32/64-bit integers, 32/64-bit floating point values and any other Java types), including a wide set of of 2D-, 3D- and multidimensional image processing and other algorithms, working with arrays and matrices.

Main Features

  • The libraries use 63-bit addressing of array elements (all indexes and length are represented by 64-bit long type). So, it's theoretically possible to create and process arrays and matrices containing up to 2^63-1 (~10^19) elements of any primitive or non-primitive types, if OS and hardware can provide necessary amount of memory or disk space.
  • Memory model concept allows storing AlgART arrays in different schemes, from simple Java arrays to mapped disk files; all necessary data transfers are performed automatically while every access to an element or a block of elements.
  • Most of algorithms are based on wide usage of lazy evaluations. Typical operations, like elementwise summing or geometrical matrix transformations, are implemented via lazy views of the source array or matrix.
    • For example, you can take a multidimensional matrix, rotate it (or perform any other affine or projective transform), and then extract a submatrix from the result. All these operations will be performed virtually (not requiring time), and actual calculations will be performed only at the moment of accessing elements, usually while copying the resulting matrix to a newly created one. Moreover, in many cases the libraries will "understand" itself, that the user wants to perform rotation or another transform, and will split the matrix into suitable rectangular blocks (fitting in RAM) and choose the best algorithm for this task at the moment of copying operation.
  • The libraries contain a wide set of image processing algorithms over matrices: linear filtering, mathematical morphology, rank operations, spectral transformation (FFT), etc.
  • There is also skeletonization and measuring of binary images.
Allegro
Allegro is multi-platform game programming library for C/C++ developers distributed freely, that provides many functions for graphics, sounds, player input (keyboard, mouse and joystick) and timers. It also provides fixed and floating point mathematical functions, 3d functions, file management functions, compressed datafile and a GUI. It can also be used for other types of multimedia programming.
Alliance
Complete set of free CAD tools and portable libraries for VLSI design. It includes a VHDL compiler and simulator, logic synthesis tools, and automatic place and route tools. Advanced verification tools for functional abstraction and static timing analysis are part of the system. A complete set of portable CMOS libraries is provided, including a RAM generator, a ROM generator, and a data-path compiler.
Alogg
'alogg' is a library which makes it easier to use Ogg/Vorbis streams with Allegro. It offers facilities to decode, stream, and encode Ogg/Vorbis streams, and integrates those facilities with Allegro's datafile and sample loading routines. 'alogg' comes with a sample player, streamer, and encoder based on Allegro's sound routines.
Alpine3D
Alpine3D is a spatially distributed (surface), three dimensional (atmospheric) model for analyzing and predicting dynamics of snow-dominated surface processes in mountainous topography. It includes models for snow cover (SNOWPACK), vegetation and soil, snow transport, radiation transfer and runoff which can be enabled or disabled on demand.
Alpy
Alpy provides a Python binding to the C Allegro game programming library. This binding is mostly focused with providing a basic "raw" interface to the library, trying to preserve most of the Python API similar to the C version to ease the transition to C programmers.
Amara
Library for XML processing in Python, designed to balance the native idioms of Python with the native character of XML.
An Gramadoir
An Gramadóir is intended as a platform for the development of sophisticated natural language processing tools for languages with limited computational resources. It is currently implemented for the Irish language (Gaeilge); this is, to the best of my knowledge, the first grammar checker developed for any minority language. Ports for Afrikaans, Cornish, Esperanto, Walloon, and Welsh are currently underway. The grammar checker can be called from emacs, vim, or OpenOffice. Various components of the engine can be bootstrapped using statistical methods based on text corpora.
Anemone
Anemone is a Ruby library that makes it quick and painless to write programs that spider a website. It provides a simple DSL for performing actions on every page of a site, skipping certain URLs, and calculating the shortest path to a given page on a site. The multi-threaded design makes Anemone fast. The API makes it simple. And the expressiveness of Ruby makes it powerful.
AngelScript
The AngelCode Scripting Library, or AngelScript as it is also known, is an extremely flexible cross-platform scripting library designed to allow applications to extend their functionality through external scripts. Featuring a syntax similar to C/C++, it has been designed from the beginning to be an easy to use component, both for the application programmer and the script writer.
AntTweakBar
AntTweakBar allows programmers to quickly add a light and intuitive graphical user interface into graphic programs to interactively tweak them. It is a small and easy to use C/C++ library that can be readily integrated into OpenGL and DirectX applications. It targets graphical programs that need an easy way to tweak parameters and see the result in real-time like 3D demos, light inline game editors, small 3D applications, prototypes, debug facilities of weighter graphical programs, etc. Programmers are not required to design the graphical interface by providing coordinates or by using a visual UI editor. Controls are automatically organized following an optional given hierarchy. In most cases, only one line of code is needed to add a new variable to a tweak bar. AntTweakBar can be easily integrated with your own windowing system or with existing toolkits. Examples of integration with GLFW, SDL, GLU are provided.
Antidote
Antidote is an open source implementation of the IEEE 11073-20601 standard. It also contains the implementation of a D-Bus based 11073 manager service.
Apophenia
'Apophenia' is a statistical library for C. It provides functions on the same level as those of the typical stats package (OLS, probit, singular value decomposition, &c.) but doesn't tie the user to an ad hoc language or environment. It uses the GNU Scientific Library for number crunching and SQLite for data management, so the library itself focuses on model estimation and quickly processing data.
App
'App' is a C++ preprocessor for that accepts as input arbitrary C++ code that may contain embedded constructs for specifying algebraic data types and associated pattern matching operations, and produces as output the same code with all such constructs translated to normal C++. 'app' provides for C++ the same capabilities that functional languages have regarding algebraic types. 'Applib' is the associated runtime library that supports the core run time requirements of the translated code, and which provides additional utilities.
AppTools
The AppTools project includes a set of packages that Enthought has found useful in creating a number of applications. They implement functionality that is commonly needed by many applications
  • enthought.appscripting: Framework for scripting applications.
  • enthought.help: Provides a plugin for displaying documents and examples and running demos in Envisage Workbench applications.
  • enthought.io: Provides an abstraction for files and folders in a file system.
  • enthought.naming: Manages naming contexts, supporting non-string data types and scoped preferences.
  • enthought.permissions: Supports limiting access to parts of an application unless the user is appropriately authorised (not full-blown security).
  • enthought.persistence: Supports pickling the state of a Python object to a dictionary, which can then be flexibly applied in restoring the state of the object.
  • enthought.preferences: Manages application preferences.
  • enthought.resource: Manages application resources such as images and sounds.
  • enthought.scripting: A framework for automatic recording of Python scripts.
  • enthought.sweet_pickle: Handles class-level versioning, to support loading of saved data that exist over several generations of internal class structures.
  • enthought.template: Supports creating templatizable object hierarchies.
  • enthought.type_manager: Manages type extensions, including factories to generate adapters, and hooks for methods and functions.
  • enthought.undo: Supports undoing and scripting application commands.
Argtable
Argtable is a freely available C/C++ programmer's library for parsing the command line arguments. Having only a few functions and a simple set of rules, it is capable of handling most aspects of command line parsing and error reporting with a minimum of fuss.
Armadillo: C++ library
Armadillo is a C++ linear algebra library (matrix and vector maths) aiming towards a good balance between efficiency and ease of use while staying lean. This library is useful if C++ has been decided as the language of choice (due to speed and/or integration capabilities), rather than another language like Matlab ® or GNU Octave. Armadillo uses a delayed evaluation approach in order to combine several operations into one and reduce (or eliminate) the need for temporaries. This is accomplished through extensive use of recursive templates and template meta-programming.
Aspell Heckert gnu.tiny.png
GNU Aspell is a spell checker that can be used either as a library or as an independent spell checker. It does a much better job of coming up with possible suggestions than other English language spell checkers. Other technical enhancements over Ispell include shared memory for dictionaries and intelligent handling of personal dictionaries when more than one Aspell process is open.
Astronomical Papers Library
A C library containing theories of motion of solar system objects that have been published in various astronomical journals such as Astronomy & Astrophysics, the Astronomical Journal, and Astronimcal Papers prepared for the use of the American Ephemeris. Currently this includes such theories as Newcomb's "Tables of the Sun" and all the planets as well as the theory known as "The Improved Lunar Ephemeris".
At-spi
'at-spi' is a part of the Gnome Accessibility Project. It provides a Service Provider Interface for the Assistive Technologies available on the GNOME platform, and a library against which applications can be linked.
Atomthreads
Atomthreads is a free, lightweight, portable, real-time scheduler for embedded systems. It is targeted at systems that need only a scheduler and the usual RTOS primitives. No file system, IP stack or device drivers are included, but developers can bolt on their own as required. Atomthreads will always be a small number of C files which are easy to port to any platforms that require threading by adding a simple architecture-specific file.
Aubio
aubio is a library for audio labeling. Its features include segmenting a sound file before each of its attacks, performing pitch detection, tapping the beat and producing midi streams from live audio. The name aubio comes from 'audio' with a typo: several transcription errors are likely to be found in the results too. The aim of this project is to provide these automatic labeling features to other audio softwares. Functions can be used off-line in sound editors and software samplers, or online in audio effects and virtual instruments.
Autogen Heckert gnu.tiny.png
'AutoGen' generates program files that contain repetitive text with varied substitutions. It simplifies the maintenance of programs with large amounts of repetitive text, which is useful if several blocks of such text must be synchronized. It includes:
  • AutoOpts - automates the handling of command line, environment and config file options, including usage text, man pages, and the invoking section of an info doc
  • getdefs - extracts AutoGen definitions from stylized comments embedded in source code
  • columns - tabularizes lists for improved output appearance
  • AutoXDR - NFSv4 specifies that its remote procedure calls be batched. AutoGen generates the code for marshalling and unmarshalling the arguments on both sides of the RPC request
  • AutoFSM - produces a transition table and prototype finite state machine where it is possible to determine a state transition type (token code) without reference to the current state
  • xml2ag - lets AutoGen use any XML file as if it were a set of AutoGen definitions
Autotrace
Autotrace is a program which converts bitmap images to vector images. It can import images in BMP, TGA, PNM, PPM, PGM, PBM and those supported by ImageMagick, and can output Postscript, svg, xfig, swf, pstoedit, emf, dxf, cgm, mif, p2e and sk
Avaneya: Viking Lander Remastered DVD
Whether you are a fan of science fiction, a space–science enthusiast, hobbyist, photographer, gamer or a patron of grass–roots libre arts and technology, you are sure to find the first successful images from the surface of Mars highly captivating. These mind blowing images were taken by NASA's Viking landers during the highly ambitious, billion–dollar mission first launched in 1975. However, many images were nearly lost to history due to magnetic tape deterioration and archaic proprietary technology. With NASA's blessing, our team developed the technology to recover many of these images. This research tool was part of the design phase of our parent project, Avaneya — our upcoming libre cerebral science fiction game for the GNU operating system set on Mars, described in the words of Richard Stallman as an exciting, pioneering project. Originally an internal research tool, overwhelming public interest compelled us to release the technology on this DVD for all. Now everyone can relive the original breathtaking experience that captured the world's attention and marked the first successful moment in history that humanity saw Mars — not as a distant, impersonal, celestial body, beheld through a telescope for centuries, but as a tangible and alien world well within its reach.
Avl Heckert gnu.tiny.png
libavl is a balanced tree library that comes with full documentation. It includes unthreaded, right threaded, and fully threaded variants of AVL tree, as well as unthreaded red-black trees. It features self-test routines as well as insertion, deletion, tree count, tree copy, tree walking and traversal, search, and threading and unthreading routines. Each function has a comment describing its interface, and each step in the algoritms the program uses has a comment also. Each source code file includes a built-in test routine.
B-Forms
'B-Forms' is an object-oriented PHP library for developing Webform-based applications. It supports tabular forms with multiple records of the same type being edited simultaneously, and provides security mechanism against data tampering. The library provides two base layouts that cover the the vast majority of cases. Only in very tricky form layouts would you have to write HTML code to specify the form layout. It also automatically saves and restores hidden fields. 'B-Forms' divides a script into three logical areas: form definition, data management, and form presentation. Forms have a powerful block architecture, each block typically representing a different data object within the form. Each block can be used to edit several objects at once- the library handles record management.
BLAS
The BLAS (Basic Linear Algebra Subprograms) are routines that provide standard building blocks for performing basic vector and matrix operations. The Level 1 BLAS perform scalar, vector and vector-vector operations, the Level 2 BLAS perform matrix-vector operations, and the Level 3 BLAS perform matrix-matrix operations. Because the BLAS are efficient, portable, and widely available, they are commonly used in the development of high quality linear algebra software, LAPACK for example.
BRL-CAD
BRL-CAD includes an interactive geometry editor, parallel ray-tracing support for rendering and geometric analysis, path-tracing for realistic image synthesis, network distributed framebuffer support, image-processing and signal-processing tools.
Babel
A collection of tools for internationalizing Python applications Babel is composed of two major parts:
  • tools to build and work with gettext message catalogs
  • a Python interface to the CLDR (Common Locale Data Repository), providing access to various locale display names, localized number and date formatting, etc.
Backbone.js
Backbone.js gives structure to web applications by providing models with key-value binding and custom events, collections with a rich API of enumerable functions, views with declarative event handling, and connects it all to your existing API over a RESTful JSON interface.
Badger
Badger is a library used to generate badge sheets for events, given a PDF template and data for the badges.
Barcode Heckert gnu.tiny.png
GNU barcode is a tool to convert text strings to printed bars. It supports a variety of standard code to represent the strings and creates postscript output. Features include:
  • available as both a library and a command line frontend (so you can include barcode printing in your application)
  • supports UPC, EAN, ISBN, CODE39, and other encoding standards
  • Postscript and encapsulated postscript output (other backends can be added as needed)
  • Accepts sizes and positions as inches, millimeters, and centimeters
  • Can create tables of barcodes (to print labels on sticker pages)
Bcfg2
Bcfg2 allows you to describe and deploy complex configurations across pools of GNU/Linux and Unix systems, leading to a consistent, reproducible, and verifiable description of your environment. Bcfg2's visualization and reporting tools aid in your day-to-day administrative tasks. Its unique analysis features help you cope with the ever-increasing complexity of your networks.
Beanstalkc
beanstalkc is a simple beanstalkd client library for Python. beanstalkd is a fast, distributed, in-memory workqueue service.
BeeCrypt
BeeCrypt is a cryptography library that contains highly optimized C and assembler implementations of many well-known algorithms including Blowfish, MD5, SHA-1, Diffie-Hellman, and ElGamal. Unlike some other crypto libraries, BeeCrypt is not designed to solve one specific problem, like file encryption, but to be a general purpose toolkit which can be used in a variety of applications. There are also no patent or royalty issues associated with BeeCrypt.
Bennu
Bennu is a software library written in PHP that implements the functionality of the IETF iCalendar 2.0 specification (RFC 2445). Its purpose is to enable applications which have an interest in this format (e.g. calendaring, scheduler and organizer programs) to support iCalendar in an easy, powerful, and extensible way.
BigMath
Based partly on Knuth's Seminumerical Algorithms and written in C, BigMath aims to be light-weight and fast. Its original implementation was for use within a kernel extension - thus size and speed were essential. BigMath supports only integer math, including add, sub, mul, div, mod, modpow, modinv, pow, gcd, factorial, radix conversion, scientific notation and various comparisons.
Bill's OpenGL Library
BOGL - an OpenGL scenegraph/renderer supporting modern hardware (vertex and pixel programs via Cg, buffer objects, etc), freetype fonts, XML resource files, bezier patches, state sorting, separate render and simulation threads.
Binary I O library
'libbinio' uses its own protocol to store and retrieve binary data portably. It uses an fprintf/fscanf interface, exporting eight functions: fputf, vfputf, fgetf, vfgetf, fwputf, vfwputf, fwgetf, and vfwgetf. Rather than using data types such as "16 bits", it uses standard C types and uses printf/scanf-style argument lists (it even uses GNU argument checking if available). It should be a drop-in replacement for printf/scanf and still work perfectly well. It aims to be portable to every C89-conforming implementation, but can use C99 and GNU extensions if available.
Bioinformatics Template Library
This library focuses on the data structures and algorithms used in bioinformatics and molecular modelling, following closely the approach of the Standard Template Library (STL) to implement efficient generic programming modules using compile time mechanisms. Although the BTL was designed with biomolecular applications in mind it contains classes of more general utility: for instance, the Matrix class could be used for matrix algebra in many contexts.
BirdFont
BirdFont is a font editor which can generate fonts in SVG, EOT and TTF format.
Biskit
Biskit is a python library for structural bioinformatics research. It simplifies the analysis of macromolecular structures, protein complexes, and molecular dynamics trajectories and offers a platform for the rapid integration of external programs.
Bit Vector
Bit::Vector is a (stand-alone) C library and an object-oriented Perl module (with overloaded operators) which allows you to handle bit vectors, sets (of integers), "big integer arithmetic" (e.g. for cryptography), and boolean matrices (all of arbitrary size) very efficiently. The package also includes an object-oriented Perl module for accessing the C library from Perl (the library can also be used by itself, without Perl). Optionally, it features overloaded operators for maximum ease of use.
BitPacket
BitPacket is a Python module to represent bit field structures in an easy object-oriented way. BitPacket provides three classes: BitField, BitStructure and BitVariableStructure which represent simple bit fields, and fixed and variable structures of bit fields respectively. BitStructure and BitVariableStructure are BitField themselves and all of them can be used together in order to build packets. That is, we can add any BitField subclass into a BitStructure or BitVariableStructure.
Bitap
The bitap library is a clean implementation of regular expression (regex/grep) string matching using the bitap algorithm. Approximate (a.k.a. fuzzy) matching is allowed. This is the same algorithm as the one used in Glimpse and agrep, but it is much more complete with regard to regular expression syntax, and is much cleaner. It is quite fast compared to other greps due to the bitap algoritm and modern CPU architechture. Modifying code for special cases speeds things up even futher. Note that the complete 'search' string must be matched by the pattern. If you want to search for substrings of the search string, prefix and postfix the pattern with '.*'.
Bitstring
bitstring is a pure Python module designed to help make the creation and analysis of binary data as simple and natural as possible. BitStrings can be constructed from integers (big and little endian), hex, octal, binary, strings or files. They can be sliced, joined, reversed, inserted into, overwritten, etc. with simple functions or slice notation. They can also be read from, searched and replaced, and navigated in, similar to a file or stream.
Bitwise enums
A very simple, 0-overhead, and yet type-safe 1-file library for doing bitwise operations between masks represented by enums. Please note: This library has been subsumed into MiLi and is no longer being maintained individually.
Blib
'blib' is the Blinkenlights Library, a programming library that gives you a kick start into development with Blinkenlights/Arcade. 'blib' also provides the Game API with which games for Arcade can be developed. 'blib' provides functions to read and write BLM, BML, and MNG animations, and to receive and send the Blinkenlights protocol.
Blip Buffer
Blip_Buffer implements efficient band-limited sound synthesis buffers, allowing high-quality emulation of video game sound chips. After setting the source clock rate and output sampling rate, waveforms are generated by specifying the time points where amplitude changes occur. Treble and bass adjustments are also supported. Many examples are included that show basic waveform generation, sample buffering schemes, and more advanced topics. They can be made to write output to a wave sound file, or optionally use the SDL multimedia library for real-time playback, waveform display, and mouse control of parameters.
BlockCanvas
The BlockCanvas project provides a visual environment for creating simulation experiments, where function and data are separated. Thus, you can define your simulation algorithm by visually connecting function blocks into a data flow network, and then run it with various data sets (known as "contexts"); likewise, you can use the same context in a different functional simulation. The project provides support for plotting, function searching and inspection, and optimization. It includes a stand-alone application that demonstrates the block-canvas environment, but the same functionality can be incorporated into other applications. The BlockCanvas project relies on included libraries that allow multiple data sets using Numeric arrays to be incorporated in a Traits-based model in a way that is simple, fast, efficient, and consistent.
Bmrblib
Bmrblib is a Python API abstracting the Biological Magnetic Resonance Data Bank (BioMagResBank or BMRB) NMR-STAR format (http://www.bmrb.wisc.edu/). It allows the writing of NMR-STAR files for BMRB data deposition and the reading and easy extraction of data from files residing in the BMRB data bank, all without knowledge of the Self-Defining Text Archive and Retrieval (STAR) format.
Boehm garbage collector
A conservative garbage collector which can be used as a garbage collecting replacement for C malloc or C++ new and as a malloc leak detector.
Bond
BOND (building object network databases) is a rapid application development tool which allows you to develop GUI front ends to PostgreSQL databases. It uses XML to define widget layout and how to obtain information from databases. This project is designed to simplify the process of developing database applications for GTK.
Booleano
Booleano is an interpreter of boolean expressions, a library to define and run filters available as text (e.g., in a natural language) or in Python code. In order to handle text-based filters, Booleano ships with a fully-featured parser whose grammar is adaptive: Its properties can be overridden using simple configuration directives.
Boost
Boost is a repository of portable and peer-reviewed C++ libraries.
Accumulators 
Framework for incremental calculation, and collection of statistical accumulators. Math and numerics
Algorithm 
A collection of useful generic algorithms. Algorithms
Any 
Safe, generic container for single values of different value types. Data structures
Array 
STL compliant container wrapper for arrays of constant size. Containers
Asio 
Portable networking, including sockets, timers, hostname resolution and socket iostreams. Concurrent Programming
Assign 
Filling containers with constant or generated data has never been easier. Input/Output
Bimap 
Bidirectional maps library for C++. With Boost.Bimap you can create associative containers in which both types can be used as key. Containers
Bind 
boost::bind is a generalization of the standard functions std::bind1st and std::bind2nd. It supports arbitrary function objects, functions, function pointers, and member function pointers, and is able to bind any argument to a specific value or route input arguments into arbitrary positions. Function objects and higher-order programming
Call Traits 
Defines types for passing parameters. Generic Programming
Chrono 
Useful time utilities. Domain Specific
Circular Buffer 
A STL compliant container also known as ring or cyclic buffer. Containers
Compatibility 
Help for non-conforming standard libraries. Broken compiler workarounds
Compressed Pair 
Empty member optimization. Data structures
Concept Check 
Tools for generic programming. Generic Programming
Config 
Helps Boost library developers adapt to compiler idiosyncrasies; not intended for library users. Broken compiler workarounds
Container 
Standard library containers and extensions. Containers
Context 
Context switching library. Concurrent Programming
Conversion 
Polymorphic and lexical casts. String and text processing
CRC 
The Boost CRC Library provides two implementations of CRC (cyclic redundancy code) computation objects and two implementations of CRC computation functions. The implementations are template-based. Domain Specific
Date Time 
A set of date-time libraries based on generic programming concepts. Domain Specific
Dynamic Bitset 
The dynamic_bitset class represents a set of bits. It provides accesses to the value of individual bits via an operator[] and provides all of the bitwise operators that one can apply to builtin integers, such as operator& and operator<<. The number of bits in the set is specified at runtime via a parameter to the constructor of the dynamic_bitset. Containers
Enable If 
Selective inclusion of function template overloads. Generic Programming
Exception 
The Boost Exception library supports transporting of arbitrary data in exception objects, and transporting of exceptions between threads. Language Features Emulation
Filesystem 
The Boost Filesystem Library provides portable facilities to query and manipulate paths, files, and directories. System
Flyweight 
Design pattern to manage large quantities of highly redundant objects. Patterns and Idioms
Foreach 
In C++, writing a loop that iterates over a sequence is tedious. We can either use iterators, which requires a considerable amount of boiler-plate, or we can use the std::for_each() algorithm and move our loop body into a predicate, which requires no less boiler-plate and forces us to move our logic far from where it will be used. In contrast, some other languages, like Perl, provide a dedicated "foreach" construct that automates this process. BOOST_FOREACH is just such a construct for C++. It iterates over sequences for us, freeing us from having to deal directly with iterators or write predicates. Algorithms
Format 
The format library provides a class for formatting arguments according to a format-string, as does printf, but with two major differences: format sends the arguments to an internal stream, and so is entirely type-safe and naturally supports all user-defined types; the ellipsis (...) can not be used correctly in the strongly typed context of format, and thus the function call with arbitrary arguments is replaced by successive calls to an argument feeding operator%. String and text processing
Function 
Function object wrappers for deferred calls or callbacks. Function objects and higher-order programming
Function Types 
Boost.FunctionTypes provides functionality to classify, decompose and synthesize function, function pointer, function reference and pointer to member types. Generic Programming
Functional 
The Boost.Function library contains a family of class templates that are function object wrappers. Function objects and higher-order programming
Functional/Factory 
Function object templates for dynamic and static object creation Function objects and higher-order programming
Functional/Forward 
Adapters to allow generic function objects to accept arbitrary arguments Function objects and higher-order programming
Functional/Hash 
A TR1 hash function object that can be extended to hash user defined types. Function objects and higher-order programming
Functional/Overloaded Function 
Overload different functions into a single function object. Function objects and higher-order programming
Fusion 
Library for working with tuples, including various containers, algorithms, etc. Template Metaprogramming
Geometry 
Geometry Library. Algorithms
GIL 
Generic Image Library Containers
Graph 
The BGL graph interface and graph components are generic, in the same sense as the the Standard Template Library (STL). Containers
Heap 
Priority queue data structures. Data structures
ICL 
Interval Container Library, interval sets and maps and aggregation of associated values Containers
Identity Type 
Wrap types within round parenthesis so they can always be passed as macro parameters. Preprocessor Metaprogramming
In Place Factory, Typed In Place Factory 
Generic in-place construction of contained objects with a variadic argument-list. Generic Programming
Integer 
The organization of boost integer headers and classes is designed to take advantage of <stdint.h> types from the 1999 C standard without resorting to undefined behavior in terms of the 1998 C++ standard. The header <boost/cstdint.hpp> makes the standard integer types safely available in namespace boost without placing any names in namespace std. Math and numerics
Interprocess 
Shared memory, memory mapped files, process-shared mutexes, condition variables, containers and allocators. Concurrent Programming
Interval 
Extends the usual arithmetic functions to mathematical intervals. Math and numerics
Intrusive 
Intrusive containers and algorithms. Containers
IO State Savers 
The I/O sub-library of Boost helps segregate the large number of Boost headers. This sub-library should contain various items to use with/for the standard I/O library. Input/Output
Iostreams 
Boost.IOStreams provides a framework for defining streams, stream buffers and i/o filters. String and text processing
Iterators 
The Boost Iterator Library contains two parts. The first is a system of concepts which extend the C++ standard iterator requirements. The second is a framework of components for building iterators based on these extended concepts and includes several useful iterator adaptors. Iterators
Lambda 
Define small unnamed function objects at the actual call site, and more. Function objects and higher-order programming
Lexical Cast 
General literal text conversions, such as an int represented a string, or vice-versa, from Kevlin Henney. String and text processing
Local Function 
Program functions locally, within other functions, directly within the scope where they are needed. Function objects and higher-order programming
Locale 
Provide localization and Unicode handling tools for C++. String and text processing
Math 
Boost.Math includes several contributions in the domain of mathematics: The Greatest Common Divisor and Least Common Multiple library provides run-time and compile-time evaluation of the greatest common divisor (GCD) or least common multiple (LCM) of two integers. The Special Functions library currently provides eight templated special functions, in namespace boost. The Complex Number Inverse Trigonometric Functions are the inverses of trigonometric functions currently present in the C++ standard. Quaternions are a relative of complex numbers often used to parameterise rotations in three dimentional space. Octonions, like quaternions, are a relative of complex numbers. Math and numerics
Math Common Factor 
Greatest common divisor and least common multiple. Math and numerics
Math Octonion 
Octonions. Math and numerics
Math Quaternion 
Quaternions. Math and numerics
Math/Special Functions 
A wide selection of mathematical special functions. Math and numerics
Math/Statistical Distributions 
A wide selection of univariate statistical distributions and functions that operate on them. Math and numerics
Member Function 
Generalized binders for function/object/pointers and member functions. Function objects and higher-order programming
Meta State Machine 
A very high-performance library for expressive UML2 finite state machines. State Machines
Min-Max 
Standard library extensions for simultaneous min/max and min/max element computations. Algorithms
Move 
Portable move semantics for C++03 and C++11 compilers. Language Features Emulation
MPI 
Message Passing Interface library, for use in distributed-memory parallel application programming. Concurrent Programming
MPL 
The Boost.MPL library is a general-purpose, high-level C++ template metaprogramming framework of compile-time algorithms, sequences and metafunctions. It provides a conceptual foundation and an extensive set of powerful and coherent tools that make doing explict metaprogramming in C++ as easy and enjoyable as possible within the current language. Template Metaprogramming
Multi-Array 
Boost.MultiArray provides a generic N-dimensional array concept definition and common implementations of that interface. Containers
Multi-Index 
The Boost Multi-index Containers Library provides a class template named multi_index_container which enables the construction of containers maintaining one or more indices with different sorting and access semantics. Containers
Numeric Conversion 
Optimized Policy-based Numeric Conversions. Math and numerics
Operators 
Templates ease arithmetic classes and iterators. Iterators
Optional 
Discriminated-union wrapper for optional values. Miscellaneous
Parameter 
Boost.Parameter Library - Write functions that accept arguments by name. Programming Interfaces
Phoenix 
Define small unnamed function objects at the actual call site, and more. Function objects and higher-order programming
Pointer Container 
Containers for storing heap-allocated polymorphic objects to ease OO-programming. Containers
Polygon 
Booleans/clipping, resizing/offsetting and more for planar polygons with integral coordinates. Miscellaneous
Pool 
Memory pool management. Memory
Preprocessor 
Preprocessor metaprogramming tools including repetition and recursion. Preprocessor Metaprogramming
Program Options 
The program_options library allows program developers to obtain program options, that is (name, value) pairs from the user, via conventional methods such as command line and config file. Input/Output
Property Map 
Concepts defining interfaces which map key objects to value objects. Containers
Property Tree 
A tree data structure especially suited to storing configuration data. Containers
Proto 
Expression template library and compiler construction toolkit for domain-specific embedded languages. Template Metaprogramming
Python 
The Boost Python Library is a framework for interfacing Python and C++. It allows you to quickly and seamlessly expose C++ classes functions and objects to Python, and vice-versa, using no special tools -- just your C++ compiler. Inter-language support
Random 
A complete system for random number generation. Math and numerics
Range 
A new infrastructure for generic algorithms that builds on top of the new iterator concepts. Algorithms
Ratio 
Compile time rational arithmetic. Math and numerics
Rational 
A rational number class. Math and numerics
Ref 
A utility library for passing references to generic functions. Function objects and higher-order programming
Regex 
Regular expression library. String and text processing
Result Of 
Determines the type of a function call expression. Function objects and higher-order programming
Scope Exit 
Execute arbitrary code at scope exit. Language Features Emulation
Serialization 
Serialization for persistence and marshalling. Input/Output
Signals 
Managed signals & slots callback implementation. Function objects and higher-order programming
Signals2 
Managed signals & slots callback implementation (thread-safe version 2). Function objects and higher-order programming
Smart Ptr 
Smart pointer class templates. Memory
Spirit 
LL parser framework represents parsers directly as EBNF grammars in inlined C++. String and text processing
Statechart 
Boost.Statechart - Arbitrarily complex finite state machines can be implemented in easily readable and maintainable C++ code. State Machines
Static Assert 
Static assertions (compile time assertions). Generic Programming
String Algo 
String algorithms library. String and text processing
Swap 
Enhanced generic swap function. Miscellaneous
System 
Operating system support, including the diagnostics support that will be part of the C++0x standard library. System
Test 
Support for simple program testing, full unit testing, and for program execution monitoring. Correctness and testing
Thread 
Portable C++ multi-threading. Concurrent Programming
Timer 
Event timer, progress timer, and progress display classes. Miscellaneous
Tokenizer 
Break of a string or other character sequence into a series of tokens. String and text processing
TR1 
The TR1 library provides an implementation of the C++ Technical Report on Standard Library Extensions. This library does not itself implement the TR1 components, rather it's a thin wrapper that will include your standard library's TR1 implementation (if it has one), otherwise it will include the Boost Library equivalents, and import them into namespace std::tr1. Miscellaneous
Tribool 
3-state boolean type library. Miscellaneous
Tuple 
Ease definition of functions returning multiple values, and more. Data structures
Type Traits 
Templates for fundamental properties of types. Generic Programming
Typeof 
Typeof operator emulation. Language Features Emulation
uBLAS 
uBLAS provides matrix and vector classes as well as basic linear algebra routines. Several dense, packed and sparse storage schemes are supported. Math and numerics
Units 
Zero-overhead dimensional analysis and unit/quantity manipulation and conversion. Domain Specific
Unordered 
Unordered associative containers. Containers
Utility 
Class noncopyable plus checked_delete(), checked_array_delete(), next(), prior() function templates, plus base-from-member idiom. Algorithms
Uuid 
A universally unique identifier. Data structures
Value Initialized 
Wrapper for uniform-syntax value initialization, based on the original idea of David Abrahams. Miscellaneous
Variant 
Safe, generic, stack-based discriminated union container. Containers
Wave 
The Boost.Wave library is a Standards conformant, and highly configurable implementation of the mandated C99/C++ preprocessor functionality packed behind an easy to use iterator interface. String and text processing
Xpressive 
Regular expressions that can be written as strings or as expression templates, and which can refer to each other and themselves recursively with the power of context-free grammars. String and text processing
Boost Numeric Bindings
Boost Bindings is a bindings library (not just) for Boost.Ublas. It offers an easy way of calling BLAS, LAPACK, UMFPACK, MUMPS and many other mature legacy numerical codes from within C++.
Bootstrap
Bootstrap is a mobile-first, responsive Web front-end framework. It is a very popular framework made by Twitter, and can be easily themed and customized.
Bootswatch
Bootswatch is a set of free themes for Bootstrap.
Botan
Botan (formerly OpenCL) is a library of cryptographic algorithms. It includes a wide selection of block and stream ciphers, public key algorithms, hash functions, and message authentication codes, plus a high level filter-based interface. The home page has a list of supported algorithms.
Botnet
BotNet is a library written in C, intended to assist in development of an IRC bot (or even an IRC client). It provides an easy-to-use model of communication with the IRC server by giving you string-sending functions and by returning messages from the IRC server into events to your application's main(). It also contains functions for easy DCC CHAT and SEND connections and an excess flood protection mechanism.
Bugs
BUGS is the Big and Useful Great Security key encryption algorithm and applications. It is easy to use, and includes sample applications and documentation. The cryptography library can also be used with your own programs. Features include:
  • Private key algorithm
  • Dynamic cryptography algorithm
  • Source code can be made public without making the algorithm weak
  • Infinite key lengths
  • Bilateral bits swwapping with various windows
  • Bilateral Pseudo randomly binary operations
  • Random number added to key
  • Random number generator using the ISAAC algorithm
  • Possibility of generating your own RNG seed
  • Five different cryptography levels, for the best possible
  • combination of efficiency and speed
  • Seed and shuffle functions
  • A clear text can be crypted using its own data
  • Two methods of execution: direct disk access or memory cache
  • Strong key generator
C++ Sockets
This is a GPL licensed C++ class library wrapping the Berkeley sockets C API. It treats one socket as one object. KThis is how the Socket class was born. This class, in itself, has all the functions needed for address translation (hostname to ip, ip to hostname etc). It owns the file descriptor / SOCKET handle. But it can't do anything. Code for actually doing something with the socket is implemented in other, Socket derived classes.
C-ares
'c-ares' is a C library that resolves names asynchronously. It is meant for applications that perform DNS queries without blocking or multiple DNS queries in parallel (ie servers that communicate with multiple clients and programs with GUIs).
C2hs
'c2hs' is an interface generator that simplifies the development of Haskell bindings to C libraries. It processes existing C header files that determine data layout and function signatures on the C side in conjunction with Haskell modules that specify Haskell-side type signatures and marshaling details. Hooks embedded in the Haskell code signal access to C structures and functions; they are expanded by the interfacing tool in dependence on information from the corresponding C header file.
C2lib
c2lib is a library of basic tools for use by C programmers. It contains features heavily influenced by both Perl's string handling and C++'s Standard Template Library (STL). Its goal is to provide some of the advantages of Perl with only around a factor of 2-3 code-size expansion, while retaining most of the efficiency advantages of C and remaining compatible with existing libc functions.
CDBlib
Read and write cdb ("constant database") files. Cdblib contains classes to read and write cdb ("constant database") files. Cdb files map string keys to string values with very fast record lookups. Cdblib also allows for in-memory indexes to enable even faster lookups.
CDimgtools
CDimg tools is a set of command line tools to manipulate CD/DVD images of certain formats.
CGAL
The goal of the CGAL Project is to provide easy access to efficient and reliable geometric algorithms in the form of a C++ library. CGAL is used in various areas needing geometric computation, such as: computer graphics, scientific visualization, computer aided design and modeling, geographic information systems, molecular biology, medical imaging, robotics and motion planning, mesh generation, numerical methods...
CGAL offers data structures and algorithms like triangulations (2D constrained triangulations and Delaunay triangulations in 2D and 3D), Voronoi diagrams (for 2D and 3D points, 2D additively weighted Voronoi diagrams, and segment Voronoi diagrams), Boolean operations on polygons and polyhedra, arrangements of curves and their applications (2D and 3D envelopes, Minkowski sums) mesh generation (2D Delaunay mesh generation and 3D surface mesh generation, skin surfaces), geometry processing (surface mesh simplification, subdivision and parameterization, as well as estimation of local differential properties, and approximation of ridges and umbilics), alpha shapes, convex hull algorithms (in 2D, 3D and dD), operations on polygons (straight skeleton and offset polygon), search structures (kd trees for nearest neighbor search, and range and segment trees), interpolation (natural neighbor interpolation and placement of streamlines), shape analysis, fitting, and distances (smallest enclosing sphere of points or spheres, smallest enclosing ellipsoid of points, principal component analysis), and kinetic data structures. All these data structures and algorithms operate on geometric objects like points and segments, and perform geometric tests on them. These objects and predicates are regrouped in CGAL Kernels.
CGKit (Python Computer Graphics Kit)
The Python Computer Graphics Kit is a collection of Python modules that contain the basic types and functions to be able to create 3D computer graphics images (focusing on Pixar's RenderMan interface).
CHEAT
Minimal unit testing framework for the C programming language.
CImg
The CImg Library is a C++ toolkit that provides simple classes and functions for loading, saving, processing and displaying images in your own C++ code. It contains useful image processing algorithms for loading/saving, resizing/rotating, filtering, object drawing (text, lines, faces, ellipses,..), and more. Images are instancied by a class able to represent images up to 4-dimension wide (from 1-D scalar signals to 3-D volumes of vector-valued pixels), with template pixel types. The package compiles it with only the standard C libraries.
CLN
CLN is a C++ class library for numbers: integers, rational, float, complex, modular integer. It implements elementary, logical, transcendental functions. Unlimited precision, 100 million digits are no problem. Easy to use because of algebraic syntax and automatic memory management.
CMUSphinx- base
Sphinx is a speaker-independent large vocabulary continuous speech recognizer. It is also a collection of free and open source tools and resources that allows researchers and developers to build speech recognition systems. The packages that the CMU Sphinx Group is releasing are a set of reasonably mature, world-class speech components that provide a basic level of technology to anyone interested in creating speech-using applications without the once-prohibitive initial investment cost in research and development; the same components are open to peer review by all researchers in the field, and are used for linguistic research as well.
CUnit
CUnit is a light-weight library that allows programmers to test their C code. Test results can be browsed in multiple formats or built-in interfaces.
CWXML
CWXML is a C library for parsing and generating XML and BXML formats with a straightforward API. Initial testing indicates that it is 3 or more times faster than other popular libraries such as expat and libxml2 at parsing XML and much faster again with BXML (a free, patent-unencumbered binary-encoding format for XML data that is a replacement for an XML file that mirrors the XML markup structures in a way similar to the in-memory representations of many parser libraries).
Cadaver
'cadaver' is a command-line WebDAV client. It supports resource upload/download/display, namespace operations (copy/move), collection deletion/creation, property manipulation, and locking operations.
Cairo
Cairo is a 2D graphics library with support for multiple output devices. Currently supported output targets include the X Window System (via both Xlib and XCB), Quartz, Win32, image buffers, PostScript, PDF, and SVG file output. Experimental backends include OpenGL, BeOS, OS/2, and DirectFB. Cairo is designed to produce consistent output on all output media while taking advantage of display hardware acceleration when available (eg. through the X Render Extension). The cairo API provides operations similar to the drawing operators of PostScript and PDF. Operations in cairo including stroking and filling cubic Bézier splines, transforming and compositing translucent images, and antialiased text rendering. All drawing operations can be transformed by any affine transformation (scale, rotation, shear, etc.) Cairo is implemented as a library written in the C programming language, but bindings are available for several different programming languages.


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