Free Software Foundation!

3DLDF 'GNU 3DLDF' is a 3D graphics package with MetaPost output. It is written in C++ using CWEB and includes documentation. The current stable release of GNU 3DLDF, 1.1.5.1, doesn't include an input routine, so user code must be written in C++, compiled, and linked with the rest of the program. However, the current development versions, collectively numbered 1.2.0.0 and available here, implement an interpreter for a Metafont-like language, so that GNU 3DLDF can be used interactively. Please see the GNU 3DLDF homepage, for more information.

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.

Aewan 'Aewan' lets users create and edit ASCII art. Users move the cursor around with the arrow keys, "paint" characters by pressing the corresponding key, and choose foreground and background colors, and bold and blink attributes, with dialog boxes. They can also select, move, copy, and paste rectangular areas of the canvas. Aewan supports "intelligent" horizontal and vertical flipping (e.g., it converts "\" to "/", etc) and can work with multiple layers, turn transparency and visibility on and off for each layer, and change the order of the layers. Thus, each layer can be edited independently to generate a composite drawing. Layers can also be used as frames for an animation, thereby creating ASCII animations.

Aqsis Aqsis is a Renderman(tm) compliant 3D rendering toolkit. It is based on the Reyes rendering approach. Features include programmable shading, true displacements, NURBS, CSG, Motion Blur, and direct rendering of subdivision surfaces.

ArtofIllusion Art of Illusion can be used as a 3D Modeller and can be used to create movies. It can currently import and export Alias .obj files and export VRML97 files (without animation). To create movies, Art of Illusion has a offline renderer and set of tools to create animations. Highlights include subdivision surface based modelling tools, skeleton based animation, and a graphical language for designing procedural textures and materials.

Asymptote 'Asymptote' is a script-based vector graphics language for technical drawing, inspired by MetaPost but with an improved C++-like syntax. It provides for figures the same high-quality level of typesetting that LaTeX does for scientific text. It is a programming language, not just a graphics program, so it can use the best features of both scripts and GUIs. High-level graphics commands are implemented in the language itself, so they can be tailored to specific applications. Labels and equations are typeset with LaTeX for high-quality PostScript output.

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

Aview 'aview' is an high quality image (pnm) browser and animation (fli/flc) player which renders its output as ASCII-art. It is implemented using AA-lib.

Ayam Ayam is a free 3D modelling environment for the RenderMan interface. Ayam features at a glance:

• RIB (RenderMan Interface Bytestream) export and import.
• Support for NURB curves and (trimmed) NURB surfaces, Boxes, Quadrics (Sphere, Disk, Cylinder, Cone, Hyperboloid, Paraboloid, and Torus), CSG, MetaBalls, Polygonal and Subdivision Meshes.
• NURBS modelling includes normal and interpolating curves as well as extrude, revolve, sweep, skin, gordon, and birail objects with caps, holes, and bevels.
• Custom objects that may freely implement their representations (using OpenGL and RIB) and even small GUIs to edit their type specific parameters may be written by the user and dynamically loaded at runtime.
• Scripting interface: Tcl.
• Miscellaneous: instancing, arbitrary number of modeling views, object clipboard, independent property clipboard, console, n-level undo.

Bagelview Bagelview is an image viewer written in C and released under the GNU GPL version 3 or later. It uses the freeglut library to display images. The viewer supports images in the portable pixmap format (PPM), the portable graymap format (PGM) and portable bitmap format (PBM). Both the RAW and ASCII variations of each format are supported.

Biggles Biggles is a Python module for the creation of publication-quality 2D scientific plots. Its features include an elegant, high-level interface, a simple TeX interpreter, and postscript, png, gif, svg, and x11 output formats.

Blender Blender is an integrated 3d suite for modelling, animation, rendering, post-production, interactive creation and playback (games). Blender has its own particular user interface, which is implemented entirely in OpenGL and designed with speed in mind. Python bindings are available for scripting; import/export features for popular file formats like 3D Studio and Wavefront Obj are implemented as scripts by the community. Stills, animations, models for games or other third party engines and interactive content in the form of a standalone binary and/or a web plug-in are common products of Blender use.

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.

Blinkensim 'blinkensim' is the Blinkenlights project's simulator. Using blinkensim you can receive the Blinkenlights Protocol as it is being sent by the Blinkenlights Chaos Control Center to the Matrix Control Units (the computers that take care of controlling the lamps). 'blinkensim' has graphic backends for DirectFB and GTK+ 2.0. It should run on all GNU/Linux systems using one of these backends.

Blinkentools 'blinkentools' is a set of utilities related to Blinkenlights. It includes b2b, a converter for blinkenmovies that can apply some simple effects, b2mng, which creates MNG animations from blinkenmovies, and bsend, which sends movies over the net using the Blinkenlights network protocol.

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).

Cairo Cairo is a vector graphics library with cross-device output support. It currently supports the X Window System and in-memory image buffers as output targets. It is designed to produce identical output on all output media while taking advantage of display hardware acceleration when available (eg. through the X Render Extension). It provides a stateful user-level API with capabilities similar to the PDF 1.4 imaging model and provides operations including stroking and filling Bezier cubic splines, transforming and compositing translucent images, and antialiased text rendering.

Cave CAVE is an acronym for Character Animation Viewer for Everyone. It uses an ncurses interface to view flipbook style character animations. Features include: frame stepping, scrolling for frames larger than screen, realtime fps adjustment and frame cueing, multiple files and file reloading, animation looping, screensaver (with shuffle), fullscreen toggle, comprehensive status bar, builtin help, supports gzipped compressed files, regular expressions for frame deliminators, support for per-frame delays defined in files, autodetecting the top of a frame and more.

Cheese Cheese uses your webcam to take photos and videos, applies fancy special effects and lets you share the fun with others. It was written as part of Google's 2007 Summer of Code lead by daniel g. siegel and mentored by Raphaël Slinckx. Under the hood, Cheese uses GStreamer to apply fancy effects to photos and videos. With Cheese it is easy to take photos of you, your friends, pets or whatever you want and share them with others.