Desktop/Android/HTML5/iOS Java game development framework
The open-asset-importer-library repository
Memory Efficient Serialization Library
Open source Cardboard SDK and samples
Simple example of draw and rotate 3D box
Delphi : VRCalc++ OOSL & + (Paged List, TextEditor, VRAstroVision ...)
Cross platform SDK
The smallest header-only GUI library(4 KLOC) for all platforms
3D .NET engine for Windows, Linux, Mac