TopCoder

The Radedit plugin, suitably stripped down for TCO (with no local compilation or testing); little more than fileedit at the moment.
A History of Single Round Match Winners
Invitational Tournament 2002 Pictures

ICFP

ICFP 2000 Contest Writeup
ICFP 2001 Contest Writeup
ICFP 2002 Contest Writeup (Second Place Overall)
ICFP 2003 Contest Writeup (Second Place Overall)
ICFP 2003 King of the Hill post-contest competition
ICFP 2004 Contest Writeup (First Place, Lightning)

Internet Problem Solving Contest 2005

I won fourth place (and top single-person team, if they had a category for that) in the Internet Problem Solving Contest.

Lars Backstrom's Determinant Contest

See how I did in Lars Backstrom's Determinant contest. We found some brand new results in this contest!

Pascal Zimmer's Mousetrap Contest

See how I did in Pascal Zimmer's Mousetrap Contest!

Al Zimmermann's Pancake Contest

See how I did in Al Zimmermann's Pancake Contest!

Rubik's Cube

See the results of my cube programming contest!

ACM UIST

ACM 2003 UIST Contest Writeup

Golly

Check out Golly, a new Life program I am helping to write!