I’ve raved about Reflector many a times, so it’s only natural that I should point you in the direction of Darrell Norton’s post entitled List of Reflector Addins which lists … wait for it … Reflector addins

Among those i see myself using in the near future is Reflector.Diff and Reflector.ClassView.

Update: Looks like the site is hosted on a free service with a monthly bandwidth cap. Luckily tomorrow is a brand new month so be sure to check it out then.