Unity is a multiplatform game development tool, designed from the start to ease creation. A fully integrated professional application, Unity just happens to contain the most powerful engine this side of a million dollars.
Some of the best Unity games as of March 2010 including in order of appearance:
An un-named Broadcom project, PressPlay's Max & The Magic Marker, RedLynx's Monster-Trucks Nitro, DigDog's Snake Galaxy, Graveck's Skee-Ball, the Dark Unity demo, Flashbang's Blush, Crescent Moon's Ravensword, Mika Mobile's Zombieville USA, Angry Mob's Guerrilla Bob, EA's Tiger Woods PGA Tour Online, Muse Games' Guns of Icarus, Mika Mobile's OMG! Pirates!, The Mechtley Bros' Touch K.O., and Flashbang's Off-Road Velociraptor Safari.
For more information visit: www.unity3d.com