A tool (developed for personal use, but nowadays used by hunderds of pilots and flight ops departments each day):
NOTAM Decoder by mickeyairlines.net
It has its limitations, but if there is standardizes GPS entry in the NOTAM, it will try to plot the affected area in Google Maps. It also decodes the standard FAA and ICAO abbreviations, along with some extra 'commonly used abbreviations'.
It makes my life planning a bit easier. As with any tool, never rely on it too much ;-)
Suggestions are always welcome to improve this tool!