Barcode scanning library for Java, Android
RenderDoc is a stand-alone graphics debugging tool
Real-time physically based rendering engine for Android, iOS, and more
Delphi : VRCalc++ OOSL & + (Paged List, TextEditor, VRAstroVision ...)
Accelerate cross-platform MR app development in Unity
A JavaScript game library to quickly develop board games for the web
Cocos2d for iOS and OS X, built using Objective-C