Party with a Local - Party with a Local is a free app that connects travelers with locals that want to party.
Wikivoyage - the free worldwide travel guide that anyone can edit.
Project Fixup - Meet people, not profiles
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.
Palaround - Meet people you should be friends with.
WikiOverland - WikiOverland is the community encyclopedia of Overland Travel.