Free and Open Game Programming Language for Windows and GNU/Linux
Open-source, cross-platform, game-development tools
A continuation of the popular Artemis ECS framework
Test project with a 2D platform game developing in Godot 3.1
Build Cross-platform Applications
C/C++ , PHP, PYTHON, 3D ENGINES, CHROME NATIVE CLIENT
Asphyre is a cross-platform framework for Delphi and FreePascal.
A cross-platform interpreter for many point-and-click adventure games
A JavaScript game library to quickly develop board games for the web
Realtime 3D engine for game development
3D .NET engine for Windows, Linux, Mac
The solution to all your problems
C-Lesh is a game programming language for 2D games.
LEGADEE (LEarning GAme DEsign Environment)
Java based Open source Voxel Engine for RTS games