Hunting for Data / Map Software

Going back a number of years (circa 1992), there was a little company out of the Chicago area that had a great application that allowed you to take customer address data and map it out (pin placements). You could then see where clients were as you traveled, locate customers within a circumference, county, state, etc.

I can't remember the name of the software but I'm looking for something similar to map things out. I don't need 'map making' software, I need a business sales tool to organize data.

Any help is greatly appreciated!