Free online tool to assist with geocoding addresses.
Geocoding (University of Southern California GIS Research Laboratory)
"Convert postal addresses into geographic coordinates using a state-of-the-art research geocoding platform." Free of charge in allotments of 2500, just cite them in your work.
Free tool to geocode addresses to GPS coordinates. Can export as a Google Earth KML/KMZ format.
Converts shapefiles for use in Google Fusion Tables. Free.
Cartographic Boundary Files (US Census)
Pre-2010 Census Cartographic Boundary files for Census, political and socioeconomic boundaries available for download.
