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OpenArena is a 3d gamecreation engine. It is a rendering system that can be used for more than just games but it is targeted at games. The basic use being create some game media textures models maps and config files for physics and rules.
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 3d game engine based on a realtime software raytracer. Currently, the following features are available : primary rays, shadows, cel shading and phong shading. Recommended hardware : modern CPU (such as Intel's core i5 or AMD FX models). This library will be used later on to develop a game. Work in progress.
Create C/C++ 3D games easily! Game engine including higher-level functions and highest-level that are little less than working games!
Include an audio system, an thread system, events, entities, physics, etc.
This engine is written in C and C++. But can be used from both languages.
It is powered by glib, Irrlicht engine, OpenAL, ODE, Ogg vorbis, etc
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.
Quake 3 Movie Maker's Edition is a special version of Quake 3 engine that aids the creation of game movies, making it possible to simplify required tasks and adds new features to the engine that are related to the movie making.
Jadeite Engine is a free cross-platform 3D game development framework. It provides rendering, sound, networking and physics. Please visit the project homepage!
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The Embedded Systems 3D GameSoftware Development Kit, short ES 3D Game SDK, is an Open Source 3D Game Engine / SDK for embedded devices based upon OpenGL ES.
Blender3D for the Zaurus!
Blender is the open source software for 3D modeling, animation, rendering, post-production, interactive creation and playback.
Available for Windows, Linux, Irix, Sun Solaris, FreeBSD, Mac OS X, and soon for the Sharp Zaurus.
LxDoom is a version of the classic fps game Doom by id Software.
Specifically, it's an engine for playing Doom levels, based on the source
code released by id Software. It aims to be free, reliable, portable, and
support a wide range of levels.