The source code to VVVVVV
Multi-platform 2D and 3D game engine
Orx: Data-Driven Game Engine
GLScene Engine for Delphi & C++Builder VCL Windows 32/64
... the open-source glide computer
Simhub dashboard for simracing
Collection of utilities that interact with the Blooket API / website
Pokedex-AR demonstrates ARCore, Sceneform, & modern Android tech stack
Reactive extensions for Unity
3D .NET engine for Windows, Linux, Mac
Cross-platform 2D game engine