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Ark.com is a search engine for people. With Ark, you can search for new people, old classmates, new business contacts, and even your friends. With over a billion social network profiles indexed, and using a modern architecture, Ark provided the most comprehensive people search engine in the world. Prior to founding Ark, our team has experience at Google, AOL, Symantec, Lithium, Yahoo! Research and Y-Combinator.

[FitFu is now closed. Here's the original description. It was one of the first gamified fitness apps] * Track your motion Using the accelerometer on your iPhone or iPod Touch, FitFu gives you feedback to help you keep going and reach your goals. * Celebrate progress with friends Friends are the key to sticking to your goals, so we've made FitFu social; whether you want to cheer them on, thank them for help or just compare your progress. * Discover a new way to stay motivated The more you and your friends are active, the higher your level and the higher your points. Unlock new content as you progress. * Stay active wherever, whenever No more being tied to a games console or a gym, now you can stay active wherever you are - be that your bedroom, your office, a hotel room or in the cabin of your Mississippi boat.