I have Unity.

I've just arranged to purchase Unity 3D, a rapid game development tool.

I was first attracted to Unity because it could use the Boo language, which has some similarities to Python, my language of choice. Having played with the trial version, I've realized that Unity is an excellent tool, and will let me focus on games, instead of game libraries and frameworks.

Ironically, my first Unity project is not a game. I'll be using it to simulate industrial robots. Hopefully my client will allow me to post some screen shots as work progresses...