Hivemapper - Build maps that reveal changes 🌏
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.
Google NightWalk - An audio Streetview tour around Marseille
NetBuddy - Netbuddy is a virtual network operator for a mobile device.
Cat Street View - Explore Japan... as a cat.
Wikivoyage - the free worldwide travel guide that anyone can edit.