Party with a Local - Party with a Local is a free app that connects travelers with locals that want to party.
ToT: ThisOrThat - Let your friends choose this or that for you
Togetheo - Meet people nearby, who share your interests 🌍
sup - The first creep-free way to see nearby friends
Project Fixup - Meet people, not profiles
Zenly - Zenly is a GPS tracker to locate your friends in realtime.