Wikivoyage - the free worldwide travel guide that anyone can edit.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Triptipedia - Triptipedia is a free collaborative encyclopedia of travel tips, where everyone can browse, save and share tips for better travel!
Cvent - Cvent's event management software provides event planners with a complete solution to increase event attendance and decrease event costs.
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.
Ticket Tailor - Ticket Tailor is an easy-to-use event ticketing platform that allows event organizers of all shapes and sizes to sell tickets online.