A set of free command line utilities for retrieving, setting, converting and working with Mac OS X icons
Displays all open files in use by an app.
Cross-platform, simple and flexible lightweight web content management application
Leopard MenuHack will allow you to back the transparent menubar in Leopard with a color of your choice
AppHack is a powerful developer and theming tool to alter, replace or extract the property lists or icons of Mac OS X
VirtualSafari – Web-based frontend for Apple’s WebKit HTML rendering engine
Vox Machina – Speech synthesizer which can save speech as mp3 or aiff
Radnor is a DOSBox Disk Operating System emulator