Party with a Local - Party with a Local is a free app that connects travelers with locals that want to party.
Decidr - Make better decisions with quick A/B polls
Palaround - Meet people you should be friends with.
Go Fucking Do It - Set a deadline and a price. If you fail, you pay.
Babble - A more personalized social network
AbTest.io - A free url shortener with A/B testing features