Pull the contents of a feed into a WordPress install and re-post the contents as real posts within your install. Easily abused, but might be good for internal “Planet” style sites.
Data Validation
Excellent reference of data validation/sanitation functions and approaches used in WordPress.
maemo.org
“Maemo is the development platform for Internet Tablets”
Yuuguu
Online Meetings, Online Presentations, Remote Teams and Remote Support. Mac, PC and Linux compat.
Styleneat
Pretty cool online tool that will take CSS input and clean it up in all sorts of ways including alphabetizing selectors and attributes and indenting collapsed, single-line statements to show DOM hierarchy
Rooms
Pretty awesome and full-featured looking IRC client for iPhone.
Flutter
Interesting-looking plugin for WordPress that allows you to set up custom Write panels and handle custom fields, file uploads etc in a pretty slick way. Also gives you Edit-in-Place for templates (hot).
WordPress Plugin Readme File Generator
WordPress Plugin Readme File Generator
Simple UI which makes it easier to write a WordPress Readme.txt file (for plugins).
hReview WordPress Plugin
Allows you to embed hReview compat reviews in your WordPress blog. Only WP2.5 compat tho.
Elgg.org
“powerful, professional social networking.” It’s a social network/community site in a box. LAMP stack. Nice.