I second Arachnophilia 4.0 at: http://www.arachnoid.com/arachnophilia/index.html
The author considers it [url=http://www.arachnoid.com/careware]'CareWare'[/url] - which, by the way, is a very nice philosophy. So there is no out of pocket cost.
It loads up really quickly. I use its find and replace feature on hundreds of files at once, all the time.
There is no messing with the code.
It is an excellent tool!
I've been using it for quite some time.