Mark Ghosh posted his list of web dev tools, and invited us to do the same, so here goes:
Blog: Wordpress
This site is hosted by WordPress, a nifty PHP weblog tool that is easy to setup and run.
Text Editor: BBEdit
The text editor of discerning webmasters since the mesozoic era of the web. It doesn't suck.
Computer: 17" Powerbook & Mac OS X
Courtesy of my employer, Content Connections, an almost completely Mac-based company of 25 or so. Joe, you rock!
SSH: Terminal or iTerm
My OS has ssh built in. Nyah nyah, Mark. :–)
IRC: Colloquy
Colloquy is the coolest IRC client on the planet. Bar none.
Email: Mail
Apple's Mail app, included with OS X. It works, and the spam filtering is good enough.
Graphics: Adobe Photoshop, Illustrator
I use Photoshop almost exclusively for web design. Illustrator I use for the occasional logo-ish bit of artwork or print-focused work.
Ok, that's my list. What's yours?