I'm curious for all of the designers/developers out there to tell a little about your toolbox and what you absolutely must have and cannot live without.

Here's what I primarily use, and I don't think I could get by efficiently without any of them:

Notepad/Wordpad (Depends on whether or not I'm editing or creating)
Pencil and Paper
Pixie (Color picking program)
Photoshop (Including all of my brushes and presets that I've created)
Image Ready
Lightwave/Poser 5
Flash MX (Although I don't tend to use it a whole lot, when it comes down to Flash it's my main program)

Optional, depending on what I'm doing, but not a complete must:
Dreamweaver
PHPEdit
DreamSuite