tripcake - Doodle for travel plans with friends
Rally by Eventbrite - Find the best local events and rally your friends to join
RoomForTea - A female-friendly housing network in London, UK.
Kibii - Discover exciting things to do!
Magpie - Female travelers club - meet women like you when you travel
Party with a Local - Party with a Local is a free app that connects travelers with locals that want to party.