Google Maps

• http://www.engadget.com/2005/03/08/how-to-make-your-own-annotated-multimedia-google-map/
• http://code.google.com/apis/maps/documentation/overlays.html
• http://esa.ilmari.googlepages.com/mymapsmarker.htm

• http://code.google.com/apis/maps/documentation/flash/tutorial-flex.html#DeclaringMaps

http://www.opengreenmap.org/en/greenmap