Here are some interesting links I’ve come across recently:

Cross-platform

• LIBGDX ROBOVM BACKEND
• Watch how Valve and Nvidia ported Source to Linux (and GL!)

Giveaways

• Free Book! (Programming 3D Applications in HTML5 and WebGL)

OpenGL

• History of the Modern GPU Series
• How to write portable WebGL
• OpenGL ES Particle System Tutorial: Part 1/3

NDK

• Porting Galcon using the Android NDK

SDKs

• The Game Closure DevKit