Organic Maps: Offline Hike, Bike, Trails and Navigation
JOSM
JOSM is an extensible editor for OpenStreetMap (OSM).
Qgis
A Free and Open Source Geographic Information System .
Værmann
Supported providers are Slovenian Environment Agency (ARSO) and Deutscher Wetterdienst (DWD, preliminary support).
KGeography
KGeography is a geography learning tool, which allows you to learn about the political divisions of some countries (divisions, capitals of those divisions and their associated flags if there are some).
Offroad
An offline map viewer for the Desktop based on OsmAnd.
Marmor
Marble is a virtual globe and world atlas — your swiss army knife for maps that you can use to learn more about the Earth and other planets.