Here are some of the sites that I have worked on in the past or am still a part of:

FeedMash.us
Developing a web based RSS/Atom feed aggregator. Currently in beta stage, with new releases coming soon.

RadLex.org
Developed web-based browser for a new medical terminology for radiology. Used Java servlets and AJAX. Some of the code is available.

HomeToday.org
Page written while working for Third Federal Savings & Loan. HomeToday is program designed to educate and aid people in the steps to successful home ownership.

Ace Crete Products
Ace Crete Products specializes in bagged cement mixes & silica sands.