xLua is a lua programming solution for C#
An MVVM & Databinding framework that can use C# and Lua
RenderDoc is a stand-alone graphics debugging tool
Desktop/Android/HTML5/iOS Java game development framework
Orx: Portable Game Engine
Delphi : VRCalc++ OOSL & + (Paged List, TextEditor, VRAstroVision ...)
High performance, cross-platform machine learning for Unity Engine
Accelerate cross-platform MR app development in Unity
Cross platform SDK