Aptana is a nice Eclipse version for web devs. Though I spend my days in Coda / Textmate - they both have HTML tidy functionality via plugins
It's great fun having to select from about 30 different versions from it
Eclipse For PHP Developers
Eclipse For Java Developers
Eclipse For the horde!
Eclipse For people who raise a little finger when drinking from a cup of tea
Urg. Why can't they just do what Visual Studio does and include it all together then ask you upon start-up what you want to do with it.