A really huge list of jQuery plugins and examples, with screenshots where possible.
#programming
Keyboard Events
Really thorough analysis of keyboard events and how they are handled via JavaScript in different browsers.
WordPress CodeSniffer Standard
WordPress CodeSniffer Standard
Checks your PHP code to see how well it conforms to the published WordPress Coding Standard.
Appcelerator Titanium
“Titanium is the first open platform for building rich desktop applications.”
Web Hooks
“User-defined HTTP callbacks for push, pipes and plugins”
EditArea
“This editor is designed to edit souce code files in a textarea. The main goal is to allow text formatting, search and replace and real-time syntax highlight (for not too heavy text).”
Data Validation
Excellent reference of data validation/sanitation functions and approaches used in WordPress.
maemo.org
“Maemo is the development platform for Internet Tablets”
MakeItLink
PHP library extracted from WordPress to handle automatically creating HTML links within a block of text.
11 Facebook App Dev Tips
Some good tips and tricks for developing FB apps.