Trixie

Trixie is to Internet Explorer as Greasemonkey is to Firefox. It lets you remix the Web via scripts.

You may do this to either make it more readable, fix bugs or to even add little features to make the site more usable to you. Trixie by itself does none of this. It is just a plugin for Internet Explorer that enables executing chunks of JavaScript code and thus lets you use the Web the way you want to use it.
Any Greasemonkey script is a Trixie script. Though, due to differences between Firefox and Internet Explorer, not all Greasemonkey scripts can be executed within IE. Trixie makes no attempt to allow Greasemonkey scripts to run unaltered, since it is best to have the script author account for the differences and have the script run on both browsers if he/she so chooses.