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.

TravelPeri - Find top tourist attractions to explore, with travel times!

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

Roaded - Travel journal and road trip planner - create beautiful interactive travel stories, sell travel...

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

TripIt - TripIt is a travel app that creates a master itinerary to organize all of your plans for your vacation or work trip in one spot.