The open-asset-importer-library repository
Desktop/Android/HTML5/iOS Java game development framework
RenderDoc is a stand-alone graphics debugging tool
Open source Cardboard SDK and samples
Simple example of draw and rotate 3D box
Everything you need to build and deploy scalable realtime 3D apps
Cross platform SDK
Cinema Enters Game Console
ZED OS the clone of Windows XP
Smart phone automation tool. Support iOS, Android, WebApp and game
3D .NET engine for Windows, Linux, Mac
The solution to all your problems