GDevelop - GDevelop is an open-source game making software designed to be used by everyone.
Blitz3D - Create 2D and 3D Games for Windows.
Game Editor - Game Editor is the open source game design software that gives you the power to create the games of...
BlitzPlus - Create 2D Games for Windows.
Godot Engine - Feature-packed 2D and 3D open source game engine.
Monkey 2 - An easy to use, cross platform, games oriented programming language