I ran across MapQuest RoutePlanner, which will optimize a route containing up to 26 addresses. The data can be entered manually, pasted, or uploaded via an Excel or CSV file, to produce a list and a map. On the list of addresses I tried as a test, it was not a surprise that the route was more or less a circle. Later on, I was surprised, and should not have been, to find that the circular route was in the clockwise direction, favoring right-hand turns. That just makes complete sense.