OK so this shit is going into Freeware Fridays later today,
but it is so fun I couldn't hold it back much longer.
http://universesandbox.com/Description:Smash planets together, introduce rogue stars, and build new worlds from spinning discs of debris. Fire a moon into a planet or destroy everything you've created with a super massive black hole.
You can simulate and interact with:
Our solar system: the 8 planets,160+ moons, and hundereds of asteroids
Nearest 1000 stars to our Sun
Our local group of galaxies
An unlimited number of fictional scenarios
Tinker with your creation or sit back and watch the effects of gravity unfold. It's fun, accessible, and easy to use.
Screenshots:
Video:You can download it from the site.
Basically, this game is
fucking amazing. There is just so much fun shit to do, and it all is just really really fucking awesome, which begs me to wonder why no one has made anything like this before, it just took 1 guy and 1 year. Just wow.