Here is some software I've made or heavily contributed to (newer first):
XCB: The X protocol C-language Binding (XCB) is a replacement for Xlib featuring a small footprint, latency hiding, direct access to the protocol, improved threading support, and extensibility.
awesome: A framework window manager.
rebuildd: A build daemon to rebuild Debian packages.
mod defensible: An Apache 2.x module to block spammers using DNSBL servers.
sysrqd: A small daemon intended to manage Linux Sysrq over network.
telak: Displays local or remote images on your root window.
VARMon: VARMon is a GNU licensed RAID manipulation / management tool for DAC960/DAC1100 controller family.
syschk: A one line system checker.
trollassassin: A spamassassin-like software which detects trolls.
libparportled: A small library intended to give you easy control on a LED device plugged on a parallel port.
apt-build: A frontend to apt to build, optimize and install packages.
vhffs: A mass-hosting platform for Debian, providing several services: web, cvs, ftp, dns, mail...
webcamd: A small webcam daemon written in Perl. Still available from Debian, but not developed anymore.
Others: for the record, some of my patches and hacks are available here.
- Much of my work is referenced on Ohloh.
