AC Explorer 3.33
This is an excellent utility for the Asheron's Call buff.
The program runs independently of Asheron's Call itself. You can select any part of the map and find the shortest distance between any two points, and pick up the coordinates as well.
One of the nicest aspects is the player input database of locations. That is, if you want to know about a specific place, say, the Heart of the Obsidian Plain, you can check out the descriptions by those who came close to actually staying there for more than a few seconds.