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

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.

Feedback Tools - Curated directory of tools for getting all the feedback

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

Emojicom.io - Capture your visitors emotions

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