RetroArch is a frontend for emulators, game engines and media players.
Cross Platform GUI Toolkit
Run Linux on the Playstation 2
A cross-platform interpreter for many point-and-click adventure games
Android, DOS, FirefoxOS, Linux, MacOS and Windows all in one..
Multi-platform game engine similar to old Megaman with a stage editor
Paintown is a 2d fighting game engine.
Portable Pokémon Mini Emulator
This project focuses on the Playstation 2 homebrew toolchain
Set of tools for the Sony PSP (tm).