Bartius Crouch has created an amazing add-on that looks to be an extremely useful modeling tool.
I just watched the video and I am blown away by all the options and the powerful versatility of his Loop Tools add-on.
Loop Tools contain the following tools:
Click one of the links above to read more information on a specific tool, including an explanation of each setting.
You can download the latest version (3.1.0) of the add-on here: <python file>