Mac | I Love Code. This is a terrific collection of tutorials on software development, covering various languages and platforms including Mac OS X (Cocoa), HTML/CSS, JavaScript, PHP, and iPhone. Just the things I'm interested in! The tutorials are contributed by some very smart developers from across the world.

nib2cib - Cappuccino nib2cib is a command line tool designed for converting Cocoa’s nibs and xibs to  <a href="http://cappuccino.org/">Cappuccino</a>’s cibs. (If you aren't familiar with  <a href="http://developer.apple.com/documentation/developertools/Conceptual/IB_UserGuide/Introduction/Introduction.html">Interface Builder</a>, Apple's application layout software, I'm sure that xibs, nibs, and cibs are glibly inscrutable. No worries. It's not required unless you're going to be working with Cocoa anytime soon...) This means you could layout your interface in IB and then use nib2cib to convert the IB output for use in Cappuccino. Pretty cool!