Google Gesture Search:

Voice Search might be the future, but Google's Gesture Search is pret-tay damn spiffy. A universal search app that crawls your contacts, apps, bookmarks and music, you just draw the letters of the word you're looking for, and it starts pulling up results. Thoroughly accurate while I was messing around with it. I wish it had a homescreen widget, so I could start drawing without firing up the app.