Cocos simplifies game creation and distribution with Cocos Creator
Open source text shaping engine
Scripts and tools for building and testing chess engines.
Delphi : VRCalc++ OOSL & + (Paged List, TextEditor, VRAstroVision ...)
Increase your android performance
Pye - Javascript Engine For Drawing Fast, Fluid and Dynamic Pie Charts
Cross-platform 2D game engine