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

Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.

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

TechEvents.co - Tech and startup events aggregator

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.

Facebook Local - Discover places to go and events happening near you