Developer tools: what's in your box?

Hey software/web developer friends,

I've been keeping a list of the software that should come standard on our developer boxes (ya know, on the off chance Dustin and I ever get around to hiring someone), but I'm curious what tools other people are using that are sweet/useful. Here's what we've got (excluding SDKs and Unixy tools):

Windows and Mac
gvim
Firefox 3.0, Chrome 1.0, Safari 4
Firebug
FireScope [great find by Star]

Windows specific
cygwin
IE6, IE7, IE8 (is there something better than MultipleIEs for this?)
Microsoft Script Editor (for IE<8 debugging)
PuTTY
SharpKeys by RandyRants (for remapping Caps Lock)
Pixie by Nattyware (for determining the color of a pixel on the screen)
PrintScreen by Gadwin (for screenshots)
Free Extended Task Manager by Extensoft (task as in "OS process," not "project to-do")

Mac specific
Parallels (for IE testing)

Any additions? Any substitutions, cases where there's a better tool for the thing we're trying to accomplish?

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