Keypad-Mapper 3 makes it easy for you to record the GPS coordinates of house numbers for adding them later to OpenStreetMap.
- records house numbers
- saves address data
- takes GPS photos for entering in JOSM
- indicates the GPS reception strength of GPS and GLONASS
- exports the recorded information
Note that although it's not mentioned anywhere except very deep in the help page, this application collects and uploads GSM cell data. See here for more information.