pycrc, a parametrizable Cyclic Redundancy Check (CRC) calculator and C source code generator written in Python.
userial is an Open Source hardware/software project that realises a USB to I2C bridge.
This is not really code, but close enough: my version of a modern "C" Coding Guideline.
The Einführung in sed (a german introduction to sed, the stream editor) is now quite mature and also well visited. English speakers might find the shell tips useful as well as the sed intro. These pages are supplemented by some notes about Regular Expressions.
The old article about Virtual domains with exim + Courier-IMAP + MySQL is still visited frequently. My 2 cents regarding a iptables firewall show how to deal with ssh port knocking.
I have written a few short texts on Subversion Backup, Tuning Subversion over HTTP and renaming the author in a SVN log partly because I needed those information repeatedly and partly because some of the information was hard to find.
I mantain the official german translation of the excellent article "How To Ask Questions The Smart Way".
The blog is a list of articles I wrote mostly out of boredom. I have collected a few links to pages I find very useful or just cool.