OpenStreetMap - OSM iD
OSM iD is a community project that allows for easier editing of OpenStreetMap data. It provides a toolset that will enable the user to make quick edits to the map using keyboard shortcuts and a set of available tags. As it is a non-profit community project, the application is available under the GNU General Public License.
In addition to its tag editing functionality, OSM iD includes several useful tools for visualizing the maps. These tools allow the user to modify the color and opacity of the various map elements and create image overlays, which can then be used to identify different areas of interest.