On the characteristic lack of usability in open source projects, and why. "The distributed, collaborative nature of open source software works for developer-level software, but works against user-level software. Imagine a motion picture produced like a large open source project. Different scenes written and directed by different people, spread across the world. Editing decisions forged by group consensus on mailing lists. The result would be unfocused, incoherent, and unenjoyable."

"DMG Canvas builds disk images from template documents that you create."

Spaced repetition! "Designed to help you remember facts (such as words and phrases in a foreign language) as easily, quickly and efficiently as possible. To do this, it tracks how well you remember each fact, and uses that info to schedule review times.

How to create an iPhone ringtone.

A variety of homespun video presentation software for all your art installation needs.

"The MacPorts Project is an open-source community initiative to design an easy-to-use system for compiling, installing, and upgrading either command-line, X11 or Aqua based open-source software on the Mac OS X operating system."

If, for some reason, FlickrExport ever fails me.

Firefox has more users, perhaps, than is commonly assumed. With Firefox 3 on the near horizon, this may shoot up even more.

Command to remove line breaks in TextMate.

Tags music in iTunes on a grid of Calm - Intense, Sad - Happy.

Run IE5, 5.5, 6, and 7 in OS X under X11 emulation. It actually works perfectly and installs in minutes with a few clicks.

Free Mac software for taking webpage screenshots. Can capture the entire length of a page (beyond the "fold").

An excellent resource for wireframing.

Like it says, a shell script to automatically install the perfect Ruby on Rails development environment on OS X. Useful!

Good collection of screensavers, if you're into that sort of thing. I'm partial to Fliqlo, a big stylish flip-clock.

Panic's graphic designer worked out a new design for the Coda toolbar that required the team to write a custom UI widget. Going the extra mile inspired Apple to do the same for Leopard.

On designing good icons.

Bouncing OSX dock icons to "The Blue Danube."

"HandBrake is an open-source, GPL-licensed, multiplatform, multithreaded DVD to MPEG-4 converter, available for MacOS X, Linux and Windows."

Some very useful utilities. Service Scrubber helps you manage OS X services, Witch turns command+tab into something that can access the windows of individual applications, not just the applications themselves.

Play Divx, AVI, and tons of other video formats in QuickTime.

"A Mac OS X bridge application between Adium IM and Address Book used to search, manage and keep your contacts in sync. "