NavigateAnyMap
Still working on my Android app (navigateanymap.eu) that enables you to navigate using any (photo of) any physical map. Have tried contacting local hiking clubs to use my app (the app 'fixes' a photo to an OpenStreetMap.org background with the use of Exif information, so that a fixed photo can be shared which is already mapped to GPS coordinates) but no luck so far. As of present, around 100 users (worldwide).