Travellar - A social travel app
RoomForTea - A female-friendly housing network in London, UK.
Hometown Tourist - Local recommendations to discover the best of the city
Podshare - A membership based live/work community.
Tripadvisor - The Tripadvisor mobile app is available for the Android and iOS platforms. It can be used to create reviews of hotels, restaurants, and to chat with other travelers on Tripadvisor forums.
Blink by Groupon - The leading app for last-minute hotel reservations. Always cheaper than the Best Online Rate.