Adventure Game Studio - Adventure Game Studio provides the tools to make your own adventure, for free!
Unity - The multiplatform game creation tools for everyone.
G3D Innovation Engine - The G3D Innovation Engine is a commercial-grade C++ 3D engine available as Open Source (BSD...
Godot Engine - Feature-packed 2D and 3D open source game engine.
GDevelop - GDevelop is an open-source game making software designed to be used by everyone.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.