Open source cross-platform multi-purpose game toolkit
Cocos simplifies game creation and distribution with Cocos Creator
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Free, cross-platform 2D game engine powered by Haxe and OpenFL
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
GEDKeeper - opensource and crossplatform genealogy management program
Source of Mana is a unique 2D MMORPG
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
Modern AS3 Game Engine
3D .NET engine for Windows, Linux, Mac
Dragging and Dropping Components for Multi-projection Applications
Mobile viewer for Kendo Tournament Manager tool.
c# lua bind with unity3d project for game development
Egret is a brand new open mobile game and application engine
The Android Comic Book reader
PixelLight is a cross-platform application framework