Cross platform toolkit for creative coding in C++
Retro Computer Image Library
it's a video player, also works for music and pictures
Orx: Portable Game Engine
Character animation system for games and simulations.
Cross platform Virtual Reality authoring and playback
Apple II GS emulator based on Kent Dickey's KEGS
A simple Text2Audio
Crossplatform emulator of Apple 2 (II,][) computer
Cross platform 2D/3D game engine written in C++11 & OpenGL ES 2/3
A cross-platform OpenGL based lightweight scenegraph library