Advanced PNG optimization program
OptiPNG is a PNG optimizer that recompresses image files to a smaller size, without losing any information. This program also converts external formats (BMP, GIF, PNM and TIFF) to optimized PNG, and performs PNG integrity checks and corrections.
Reference library for supporting the Portable Network Graphics (PNG) format.
Creates APNG animation from PNG/TGA image sequence.
Creates highly optimized Animated PNG files from PNG/TGA image sequences. CLI versions available for all major OSes. GUI versions for Windows and macOS. Also, APNG Disassembler can be found at http://sourceforge.net/projects/apngdis
libmng -THE reference library for reading, displaying, writing and examining Multiple-Image Network Graphics. MNG is the animation extension to the popular PNG image-format.
The Animated Portable Network Graphics (APNG) is an unofficial extension of the Portable Network Graphics (PNG) format. APNG patch provides APNG support to libpng.
A project that has moved to GitHub
GLFW is an Open Source, multi-platform library for creating windows with OpenGL contexts and receiving input and events. It is easy to integrate into existing applications and does not lay claim to the main loop. GLFW has moved to GitHub: https://github.com/glfw
PNG (Portable Network Graphics image format) and MNG (Multiple-image Network Graphics image and animation format) home sites
C/C++ library to add light and intuitive GUI to OpenGL and DX programs
AntTweakBar is a small and easy to use C/C++ library that allows programmers to quickly add a light and intuitive GUI into OpenGL or DirectX based programs to interactively tweak parameters on-screen. AntTweakBar works with Linux, Windows and OSX, and can be easily integrated with custom windowing system or with existing toolkits. Examples of integration with GLFW, SDL, GLUT, SFML and DirectX are provided. The AntTweakBar library mainly targets graphical applications that need a quick way to tune parameters (even in fullscreen mode) and see the result in real-time like 3D demos, games, prototypes, inline editors, debug facilities of weightier graphical applications, etc. The project is not maintained anymore but feel free to download and modify the source code to fit your needs or fix issues.
Convert GIF animations into APNG format.
This program converts GIF animations into animated PNG format. Usually it makes the files smaller. CLI version is OS-independent, GUI version is available for Windows. Another converter: http://sourceforge.net/projects/apng2gif
Convert APNG animations into animated GIF format.
This program converts APNG animations into animated GIF format. Wu64 quantization is used for true-color files. Transparency is handled either using a threshold, or composed over chosen background color. CLI version is OS-independent, GUI version is available for Windows. Another converter: http://sourceforge.net/projects/gif2apng
Explore procedural worlds on your GPU. Worlds are defined by GLSL programs that map XYZ coordinates to the distance to the nearest surface. Design your own worlds, modify parameters in realtime and render hires videos of your recorded journey.
OpenCTM is a file format, a software library and a tool set for compression of 3D triangle meshes. The geometry is compressed to a fraction of comparable file formats (3DS, STL, COLLADA...), and the format is accessible through a simple, portable API
Orx: Portable Game Engine
Orx is a portable, lightweight, plugin-based, data-driven and extremely easy to use 2D-oriented game engine. As orx is data driven, it allows users to create games with a small number of lines of code and reduces drastically the development time.
Graphics primitives (line, circle, rectangle etc.) with AA support, rotozoomer and other drawing related support functions wrapped up in a C based add-on library for the Simple Direct Media (SDL) cross-platform API layer.
SDL Framework (SDLFW) SDLFW is a cross-platform framework from the powerful SDL library to create your own 2D games with the Lua programming language. It's easy-to-use, free, open-source, and works on Windows and Linux.
Library for loading PNG files for the Allegro library. Does not depend on libpng nor zlib (however can take advantage of zlib if installed).
Motion Blur is a free, professional program to simulate various visual effects like blur, judder or tearing that accompany a motion picture. This gives you a preview of how a real motion picture would look like when filmed with the custom parameters.
An unofficial dev kit for the PV2 camera. Currently includes v8 uRISC assembler, linker, and source examples. It can be used to create firmware patches and uploadable programs for the $10 and $20 Ritz/CVS "single-use" PV2 digital camera.
A hight performance well designed Collision Detection Library for the Open Dynamics Engine. Supports CONCAVE TRIMESHES and Deformable bodies.
Embedded Font Generator (EFGen) is a generator of a cross-platform ANSI C code that renders a text using OpenGL. Generated code includes everything you need to render a custom text, also it is easy to compile and link with your application.
AllegroGL is a small library intended to allow Allegro applications to use OpenGL in Unix, Windows, Mac OS X and DOS.
Multi-Language Wrapper Collection for the Irrlicht Engine
2licht's aim is to provide a collection of wrappers for the popular Irrlicht Engine (http://irrlicht.sf.net/). It is still in development; the first wrappers to be released will be the C and Object Pascal interface; followed by a .NET library.
BlitPixie is a collection of optimized software blitters, written in assembly language or normal ANSI C. They perform a lot of normal pixel moving operations, and all work in 8/16/32-bit depth.
CorEngine is a work in progress, OpenGL graphics powered 3D game engine designed to help independent game developers with quick prototyping and game/virtual environment creation. The engine supports a standard set of features, like skeletal animation, post processing, Lua/C programming, physics powered by Bullet Physics, GUI and 2D/3D Audio.
A fork of Sauerbraten/Cube2 (sauerbraten.org) with several multiplayer modes, online map editing, dynamic mapmodel physics, enhanced particle effects, unique weapons and powerups, and more. This project is currently not under active development.