Mednafen is a portable, utilizing OpenGL and SDL, argument(command-line)-driven multi-system emulator.
Complete, Fast, Accurate, Game Boy/CGB/SGB Emulator.
RealBoy is a Complete, Fast, Accurate, Free/Open-Source Game Boy, Game Boy Color and Super Game Boy Emulator for Linux/Unix.
A techonogically advanced engine using C++ and ASM as languages.
A techonogically advanced engine using C++ and ASM as languages, with improved performance and a almost virtually infinite triangle count support, even on slower and older machines. It haves a full shader system, physics system (DOE Based), 100% physically correct lightning and colour grading, and supports various popular formats in 3D modelling and gaming scene. It was previously under a heavy eula policy, but now is under GPL because of internal problems.
Forgotten Destruction is a free real-time strategy game developed using the Simple DirectMedia Layer. It focuses on the conflict between an evil shadowy empire and human race with their nearby allies.