GDevelop - GDevelop is an open-source game making software designed to be used by everyone.
Unity - The multiplatform game creation tools for everyone.
Project Anarchy - Project Anarchy is a complete end to end game engine and state-of-the-art toolset for mobile.
Godot Engine - Feature-packed 2D and 3D open source game engine.
Struckd - 3D Game Creator - Struckd is the next-generation gaming platform for user created content where people of all ages...
Blender - Blender is the open source, cross platform suite of tools for 3D creation.