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.

Hometown Tourist - Local recommendations to discover the best of the city

NetBuddy - Netbuddy is a virtual network operator for a mobile device.

inviita - inviita is a free app that instantly creates tours that match your mood, in any city in the world.

Wikivoyage - the free worldwide travel guide that anyone can edit.

VoiceMap - VoiceMap offers location-aware audio tours created by local storytellers. Tours can be downloaded to a mobile app and audio tracks automatically start playing triggered by GPS. VoiceMap also lets you sign up as storyteller and create your own tour.