Open Source Address Scrubber?

Question

I have set of names and addresses that have been entered into and excel spreadsheet, but the problem is that the many people that entered the addresses entered them in many

Answer 1

Most of the software that I've worked with to do this is very expensive (or to put it another way, marketing departments are naive and have huge budgets).

This sort of work is a precursor to Geo-coding. This linked Wiki article includes a list of Geocoding software, some of which is free. If you're lucky, some of the free ones may include address standardizing routines.

If you find a good one, let me know.