I am working on an application which needs to generate a service call route, I need to find a way to sort the addresses in the route by distance taking the main office as the start point.

Does anybody know of any tool, library, website, or whatever that would help me get this done?

Thanks!

Thanks for the links info, I will check them out.

Basically we have all address destination and the starting point is the main office, I am looking for a tool that will accept a bunch of addresses and based on the starting point organize the order of each address so the driver will go to the closest one first and from that one the next closer to the first and so on.

Right now, I am simply ordering the report by address, but that is not enough.