iUI is a framework consisting of a JavaScript library, CSS, and images for developing iPhone webapps
Ruby commandline lib for smush.it
Stanford CS class on iPhone programming. All material is online available.
CocoaDev is a WikiWikiWeb site for and by the Mac OS X developer community.
The document TYPO3 Extension Development is a guide mainly for extension developers, explaining the basic steps to create an extension and going further into advanced topics useful for TYPO3 extension development.
Mit dem Kickstarter eine Extension erstellen
t3-module development starting point
using user data and hooks
As part of GHOP 2007, one task was to create a cheat sheet for core hooks. kourge came to the rescue and created such a cheat sheet for Drupal 6. See the attachment below.