RetroArch is a frontend for emulators, game engines and media players.
A cross-platform interpreter for many point-and-click adventure games
Paintown is a 2d fighting game engine.
Portable Pokémon Mini Emulator
Life Screensaver
Set of tools for the Sony PSP (tm).
Cross Platform GUI Toolkit
2D Game Engine
Pye - Javascript Engine For Drawing Fast, Fluid and Dynamic Pie Charts
Multi-platform game engine similar to old Megaman with a stage editor