Over the years I've tried to give back something from all the great open source software that I've used (and am using). It's a small addition to the vast sea of projects and code that has been contributed by people over the years.
The Shuttle Project is one that involves the beautification of the WordPress administration panel.
Project page and PSD download
Single and two column themes for Wordpress. These are out of date and have not been updated since version 2.0. These are however still being used in various places on the net.
Rin theme (v1.1) and Manji theme (v1.11)
FOFRedux is an online RSS aggregator that sits on your server (so all your information is kept private and can be accessed from anywhere with just a web browser).
Project page and PSD download
Habari