The Powder Toy 91.5

The extremely impressive physics simulator The Powder Toy has got a few updates recently, taking it to 91.5. Since I last wrote the program has seen the addition of a new mix-tool, a favorites menu and a really long list of other changes and fixes. It's as impressive as always, letting you construct everything from electronic circuits to nuclear reactors. Besides being very fun to explore and play around in, I guess this can be used greatly for educational purposes.

The Powder Toy includes a built-in browser to download simulations from other players.