I was needing to get a quick check between two zips and didn't feel like maps.google, mapquest or any other highly graphical solution -- I just wanted number of miles. .., and it's always a treat to come across a website the delivers way more than you expect.
The treat: MelissaData by Raymond F. Melissa
How far is it between two zip codes?
Monthly home sales by zip?
What schools are there in zip 48103?
They've got address and street data, radius searches, stats and averages, demographics and you can even pull all this
into your own site and keep your own branding so visitors are impressed all while keeping your name on their brain.
Very reasonable rates too. A few searches are free, but access is starts at only $100 for a year, or just wait 24 hours when your limit resets.
Check em out. Would like to know what you think about this from a real estate perspective.