I've been using Ubuntu for a couple of years now and my editor has become BlueFish (the only hack was that I added the colour coding for Classic ASP Vbscript).
I still use HeidiSQL (running thanks to WINE) - haven't found a better MySQL client.
I have to say that Homesite was my favourite editor, but since that's gone the way of the Dinosaur, I probably had to move anyway.
The only time that I still use Windows is to administer MSSQL - I haven't found a substitute for MS' tools yet. That and Cubase (but that's not really relevant to this forum).