Unity - The multiplatform game creation tools for everyone.
Tanglet - Tanglet is a single player word finding game based on Boggle.
Godot Engine - Feature-packed 2D and 3D open source game engine.
Lexica - An open source word-search game.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Wordbase - Wordbase - the fun, addictive and challenging game of words and letters for iPhone!