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.
Mapbox - An open source mapping platform for custom designed maps. Our APIs and SDKs are the building blocks to integrate location into any mobile or web app.
NetBuddy - Netbuddy is a virtual network operator for a mobile device.
QGIS - QGIS is a desktop geographic information system, or GIS.
Wikivoyage - the free worldwide travel guide that anyone can edit.
OpenStreetMap - OpenStreetMap is a map of the world, created by people like you and free to use under an open license.