Journy - Tastemaker-driven concierge to plan your perfect trip
Wikivoyage - the free worldwide travel guide that anyone can edit.
Hirento - Book travel services in ONE place!
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.
Duffel - We offer a powerful API that enables any travel business to search, book, and sell flights from a network of the world's leading airlines in minutes, not months.
Triptipedia - Triptipedia is a free collaborative encyclopedia of travel tips, where everyone can browse, save and share tips for better travel!