Tabletop Simulator allows you to fix boring, traditional games like Checkers and Backgammon by adding awesome dragons to them.
The genius of this physics-based simulation isn't that it allows you to play board games in an online environment — its that it lets you break them down at a molecular level. Playing with its Lego box of options is delightful solo, and becomes something transcendent when online multiplayer strangers join the mix. It's one part Chess, one part live improv game design and one part Calvinball.
In this Overview, Justin and I hit the drawing board to compose a blockbuster board game using Tabletop Simulator's vast array of tools. The end result is a weird kind of Monopoly/Candy Land hybrid that is played entirely on a picture of Steve Buscemi's face, so I'd say we were pretty successful.