Recent software that I've written and open-sourced is available at github.com/derat and isn't listed below.
streetnames is a website that lets you test yourself to see how many streets in San Francisco you can name.
It is intended to be small, fast, and minimally dependent on other libraries. It can serve as an alternative to gnome-settings-daemon for users who are not using the GNOME desktop environment but who still run GTK+ applications and want to configure things such as themes, font antialiasing/hinting, and UI sound effects.
Some friends and I used to use a multiplexing chat bot called PartyChat for group-chatting within our Gmail accounts. It was down one weekend, so I spent a boring Saturday banging out a quick replacement in Ruby and jokingly named it "smartychat". The original PartyChat was later ported to Google App Engine and then EC2 (I guess?) and now doesn't exist (I think?). If you want to look at my smartychat code as an example of an XMPP bot, it's at GitHub.
This is a little C program that parses zone files used by the BIND DNS server and spits out their content in the native format of the tinydns component of Dan Bernstein's djbdns DNS server. It should be pretty fast (it does a single pass of each entry and doesn't dynamically allocate any memory). It makes more of an effort to mimic BIND's behavior than other programs and libraries that I've seen that parse zone files. Be advised that I wrote it a long time ago at a previous job and the code is sorta embarrassing now. I've pushed the source to GitHub.
Gearman "provides a generic application framework to farm out work to other machines or processes that are better suited to do the work". I have still never actually used it, but I was bored and looking for a project, so I wrote a Ruby API for communicating with Gearman servers. It turns out that writing tests for client-server interaction is kind of neat. The library appears to be under active development by other people at this GitHub repository now.
Here are a couple of Perl scripts that may be useful if you're using Highwind Software's Typhoon Usenet server. I wrote them in 2003 or 2004 for a previous job and haven't touched them since then.
radius_auth.pl is an authentication wrapper that lets Typhoon check users against a RADIUS server.
sync_active.pl is a cheesy script that downloads the list of newsgroups from ISC's FTP site and brings the server's active file into sync with it (parsing control messages is a better route to take, though).
This is an application that I used to run on a small PC that was hooked up to a stereo and television. It plays MP3s and IT/S3M/MOD/XM modules using the FMOD library, runs arcade, NES, SNES, and Genesis games using a variety of emulators, reads M3U playlists and ID3v1 tags, has some neat graphical effects (translucent zooming text, neat water-rippling effect on backgrounds, text flying all over the place on the music player screen, things happening in time with the music, etc.), supports joypads and IR transmitters, and is themable. Here's the source.
Here are some little applets that I wrote way back in the 20th century. They used to, and may still, work with Enlightenment 0.16.
I wrote a long thing about how I generated an AMP version of my website.
A collection of useful bash and zsh configuration snippets.