tangogps is an easy to use, fast, and lightweight mapping application for use with or without GPS. By default, tangoGPS uses map data from the Openstreetmap project. Additionally, a variety of other repositories can be easily added. The maps are downloaded and cached for offline use while you drag or zoom the map. Furthermore, you can conveniently pre-cache areas with tangoGPS. If connected to a GPS, your current position and track are shown on the map, and you can log positional data for further processing, e.g. for geocoding photos or uploading streets to Openstreetmap.