CGI:IRC
I'm the main author of CGI:IRC, which was among one of the first 'Comet' based applications. It's looking a little dated now and could do with some attention, which I never quite find the time for.
Wikipedia
I've written a few things related to Wikipedia, mostly related to getting a summary of articles.
IRC
My IRC client of choice is Irssi (when I'm not using CGI:IRC of course); I have written a few Irssi scripts. I'm also involved with an IRC network and have written various code as part of that (including contributing to BOPM).
Others
I've written a few Perl modules and other things, you can find them on GitHub, or on CPAN.