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.
Detour - Immersive audio walks, now in 17 cities
NetBuddy - Netbuddy is a virtual network operator for a mobile device.
Guides by Lonely Planet - Explore city guides curated by experts.
Wikivoyage - the free worldwide travel guide that anyone can edit.
Flamyngo - Create a city guide with help of your friends.