I love Google Webmaster Tools, especially when it started showing external links. This link overview left me and quite a lot of other SEO’s longing for more though, as we all wanted more info on that page. I have now created a Greasemonkey script to show the PageRank of the page linking to you, and the anchor text used for the link.
The script also checks if the link is by any chance nofollowed, and gives you a warning when it is. It does the same when it doesn’t find the link. Check it out: GWT External Links++!