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.
3D game engine (more powerful redesign of the Cube engine) and FPS game
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
3D Engine c++
The Irrlicht Engine is an open source high performance realtime 3D engine written and usable in C++. It is completely cross-platform, using D3D, OpenGL and its own software renderers.
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
3D game engine and multiplayer/singleplayer FPS game
Realtime 3D engine for game development
The SoftPixel Engine is an OpenSource high level realtime 3D engine for C++ (GNU C++ & VisualC++). It supports Direct3D11, Direct3D9, OpenGL 1.1 - 4.1, OpenGL|ES 1.1 and OpenGL|ES 2.0 and runs on Windows, Linux, Android and iOS.
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.
GLUI is a GLUT-based C++ user interface library which provides controls such as buttons, checkboxes, radio buttons, and spinners to OpenGL applications. It is window-system independent, using GLUT or FreeGLUT.
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
Deconstruct APNG file into a sequence of PNG frames.
This program converts APNG file into a sequence of individual PNG frames. Command-line interface and GUI viersions. Also, APNG Assembler can be found at http://sourceforge.net/projects/apngasm
CxImage is a C++ image processing library. It can load, save, display, transform images in a very simple and fast way, with transparency, multiple layers and selections, support for BMP GIF JPG PNG MNG TIF ICO TGA PCX J2K JBG RAS PNM RAW PSD
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
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.
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.
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
A .NET wrapper for the Irrlicht Engine
The Irrlicht Lime is a .NET wrapper for the Irrlicht Engine. It wraps most of API available in native library, easily allowing you to use 2D/3D graphics in your app, written in C#, VB.NET or other .NET language. Currently Lime is being develop under Visual Studio 2010 with .NET Framework 4.0. It includes bunch of examples and IntelliSense documentation. Lime is not a distinct "engine", it is a wrapper with almost the same architecture witch native Irrlicht Engine has. You do not need to download/compile Irrlicht Engine, wrapper already has it and ready to be used straight from the box.
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.
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.
Lightfeather is a 3D engine for Linux, Mac OS X and Windows. It is designed to be easy to use but still take advantage of the features of modern graphics hardware.