Wikivoyage - the free worldwide travel guide that anyone can edit.
Noor - Chat like you're in the office together
Travel d'globe - Travelling Planning Is Simple, Easy And Quick
Commons - Private Clubhouse for your team to collaborate and connect
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.
ZipMessage - ZipMessage replaces live meetings with asynchronous conversations.