Blender

Blender is a 3D animation tool that also has a game engine build into it. This is one of the more obscure development tools as far as game development goes but is used often for 3D modeling and animation.

Games created with Blender
Here is a list of games made with Blender: notice: please add to this list!
 * Duk Duk
 * Color Cube
 * Super Blender Galaxy (Mario Galaxy like game)
 * Yo Frankie

Blender Game Engine
Blender game engine has a basic connect the dots interface with events and actions, these action can run python code allowing for more complex gameplay elements. The Blender Engine also comes with a easy to use physics engine.