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OpenStreetMap is a free editable map of the whole world. It is made by people like you. OpenStreetMap allows you to view, edit and use geographical data in a collaborative way from anywhere on Earth.
JOSM is an editor for OpenStreetMap written in Java 1.5. The current version supports stand alone GPX tracks, GPX track data from the OSM database and existing nodes, line segments and metadata tags from the OSM database.
Marble is a Virtual Globe and World Atlas that you can use to learn more about Earth: You can pan and zoom around and you can look up places and roads. A mouse click on a place label will provide the respective Wikipedia article. Marble is also a light weight generic geographical map component ... [More]
gvSIG Mini is a mobile free viewer of free aceess maps based on tiles (OpenStreetMap, YahooMaps, Microsoft Bing, ...), with a WMS, WMS-C client, address and POI search, routes, hybrid location and many more things. It runs on Java ME and Android smartphones.
Simple editor for openstreetmap.org map data. OSM2Go is particularly suited for small-screen portable systems such as subnotebooks, handheld devices and netbooks which do not have a network connection at all times. OpenStreetMap is the free, editable map of the world: the Wikipedia of maps.
Walking Papers is like walking, but with paper. With Walking Papers you can print a map from OpenStreetMap, walk around with it and take notes and sketch improvements - then you scan it in, edit it in Potlatch and then we all have a better map!
Project to control GPS Dataloggers, mainly MTK based and convert GPS logs to several other formats using filters, etc. Runs on most platforms (Desktops, Linux, Mac, Palm, Mobile Phone, PocketPC).
alaCarte is a tile renderer for OpenStreetMap data written in C++11, using Cairo for rendering and Boost-Spirit for MapCSS parsing.