RetroArch is a frontend for emulators, game engines and media players.
One framework for creating powerful cross-platform games
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
SkiaSharp is a cross-platform 2D graphics API for .NET platforms
Turn your phone into a wireless Xbox controller via any web browser.
3D modeler, 3D game maker, 3D demo maker
Cerberus Content Management System
2D Game Engine
Pye - Javascript Engine For Drawing Fast, Fluid and Dynamic Pie Charts