Open source cross-platform multi-purpose game toolkit
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Cross-platform game engine in Rust
Open source library for creative expression on the web, desktop, etc.
GLScene Engine for Delphi & C++Builder VCL Windows 32/64
Dragging and Dropping Components for Multi-projection Applications
Egret is a brand new open mobile game and application engine
The Android Comic Book reader