This sort of software is the heart and soul or the "core business" software that a company will create to drive their site or business.
But once in a while you get some new business person that thinks that every idea has already been written and can be found. While I know this idea has been done, the fact you asked means that you may be lacking the programming staff to implement it. Talk to your programmer and tell them what you need and ask how long till you can deploy it.
I have a bulk list 100K+ customers - usernames, names, addresses, etc. I need to be able to match each customer with nearest dealer location from our dealer feed and output that location for each customer.
Does anybody have a recommendation on software/tool that would handle this? Obviously, using the website versions of store locators and typing in each user address is not practical.