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.

FareUpThere - Earn rewards for your feedback on flights

Wikivoyage - the free worldwide travel guide that anyone can edit.

RoadGoat - Map where you've traveled. Get matched with best places to go next!

Triptipedia - Triptipedia is a free collaborative encyclopedia of travel tips, where everyone can browse, save and share tips for better travel!

Skyscanner - Skyscanner.com compares over 1000 airlines to find you the cheapest airfares, fast.