Cocos simplifies game creation and distribution with Cocos Creator
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Free, cross-platform 2D game engine powered by Haxe and OpenFL
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Open source library for creative expression on the web, desktop, etc.
Cross-platform game engine in Rust
GLScene Engine for Delphi & C++Builder VCL Windows 32/64
... the open-source glide computer
Create tennis tournament schedule
The Atomic Game Engine is a multi-platform 2D and 3D engine
Open-source, cross-platform, C++ game engine for creating 2D/3D games
3D .NET engine for Windows, Linux, Mac
Mobile viewer for Kendo Tournament Manager tool.
A cross-platform OpenGL based lightweight scenegraph library