SpoofStick
There’s a browser extension I just ran across called SpoofStick that sounds pretty interesting. It basically sticks a message up in your browser for any site you go to that says what domain you are currently on. The goal, obviously, is to prevent falling victim to phishing attacks.
Only downside, according to incidents.org the utility doesn’t appropriate handle a more recent spoofing vulnerability in IE.

20. August 2004 at 03:48
Thanks for that, could come in handy!