inviita - inviita is a free app that instantly creates tours that match your mood, in any city in the world.
Party with a Local - Party with a Local is a free app that connects travelers with locals that want to party.
She Roams Solo - Travel social networking platform and forum for women
Cool Cousin - Shaking up the travel world with good old human connection
RoomForTea - A female-friendly housing network in London, UK.
Triip.me - The happiest way to travel in 227 countries