Warning: this is a script for Blender 2.4 and won't work in Blender 2.5 or later
You can find the new version here.
The LoopTools script is a collection of tools to aid modelling involving loops.
Latest version: 2.5
support thread for this script at BlenderArtists where you can ask any questions or suggest improvements.
python file> which can be directly run inside Blender's text editor
or integrated in the scripts menu (it's located in the 'Mesh' submenu). For more information on
using scripts check out the page: how to run a python script?