iTerm – Replacement for the native OS X terminal program.
OS X
Full keyboard access and Finder shortcuts
Folklore.org: Macintosh Stories
Folklore.org: Macintosh Stories: The Original Macintosh –
“Anecdotes about the development of Apple’s original Macintosh computer, and the people who created it.”
Quicksilver
Quicksilver – “an evolving structure for manipulating any form of data; an application as slippery and mutable as its namesake. Modules can be added to accomplish almost anything” Requires OS 10.3
X vs XP: Fonts
X vs XP: Fonts – Useful information if you plan to wipe your hard drive, or if you are curious as to which fonts are available for OS X and/or Windows users visiting your Web site. X vs XP is a great site in general, though with a slight lean towards the OS X camp.