How to make a Map Scale Bar in Gimp (the easy way)
(aka anything you can do, I can do better ;) )
Reading this thread on making a map scale bar with photoshop reminded me of a script I saw before for gimp...
A few seconds of google-fu and:
Plugin para Gimp para hacer escalas de mapas (Gimp Map Scale Legend Plugin)
and the provided samples:
While the page and screen shots are in Spanish, the script provided is in English.