Blitz3D - Create 2D and 3D Games for Windows.
Unity - The multiplatform game creation tools for everyone.
BlitzMax NG - Fast cross-platform, open-source, programming language.
Godot Engine - Feature-packed 2D and 3D open source game engine.
Monkey 2 - An easy to use, cross platform, games oriented programming language
Blender - Blender is the open source, cross platform suite of tools for 3D creation.