ieHTTPHeaders is an explorer bar for Internet Explorer that will show you the HTTP Headers IE are sending and receiving. This is a minor tweak that will serve to give a little more useful information in the course of your work day.
Mozilla has had a similar extension for a while now, but this link may be useful for those of you who have not yet switched from IE to Firefox. Whoops, are my prejudices showing? Seriously though I wonder how many devout users of Internet Explorer have at least given Firefox a test drive? I would love to know in the comments specific reasons from IE users as to why a might not have done so, if you wouldn’t mind.