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
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.
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
3D game engine and multiplayer/singleplayer FPS game
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.
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
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
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
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.
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.
AllegroGL is a small library intended to allow Allegro applications to use OpenGL in Unix, Windows, Mac OS X and DOS.
An image manipulation tool for Commodore 8-bit computers' graphic formats.
Game engine built around the OGRE graphics engine - suitable for prototyping music-based games.
Aeon is a totally cross-platform game development kit coded in and designed for C++. Aeon includes engines for 3D/2D graphics, audio, input, GUI, and much more, as well as several useful tools, all designed to make game creation easier and more practical.
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.
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.
GIMP Massive Package for Windows and Mac
(formerly) GIMP for Windows and Mac with a huge amount of Open Source or otherwise free or public domain plugins. windows version has installer. mac version must be assembled but has zip files. heard some of the plugins went commercial, and I don't know which, so this project is off. please get GIMP from and donate to the following projects (not mine): http://sf.net/projects/gimponosx http://projects/gimp-win
Hardwarie is a software library for using 2D Graphics Hardware Acceleration on Mac OS 9 and Mac OS X, through either Quickdraw 3D or Apples OpenGL implementation. It has a very simple interface, allowing you to achieve high frame rates in a simple manner
Hinge3D is an component based message system developed for rapid game prototyping, game development and game design testing. Is has semi automated multithreading and uses different open source projects as codebase, like Ogre3D,OIS,Lua and Boost.
Slimn is a Python module (based on FLTK) for painting simple graphics to a window and responding to user input.
A basic graphics, sound, input and utility library for games and applications, geared towards flexibility, ease of use/prototyping/debugging, portability and performance.
VocalEasel is a simple lead sheet editor and music rehearsal tool designed for the needs of Jazz vocalists, using LilyPond to produce printable lead sheets and MMA (Musical Midi Accompaniment) to produce MIDI accompaniments.