Schoorbs
Schoorbs is a free room/resource booking system licensed under the GPLv2 which runs as a web application using PHP and supporting several database backends including MySQL and PostgreSQL.
http://schoorbs.xhochy.com
Rainpress
Rainpress is a compressor for CSS written in ruby which does not apply common compression algorithms like gzip, it removes unnecessary characters and replaces some attributes with their shorter equivalent name.
http://code.google.com/p/rainpressScrobbler
Scrobbler is a ruby-wrapper for the audioscrobbler (last.fm) web services.
http://github.com/xhochy/scrobblerLast.fm nationality statistics
Last.fm nationality statistics is a little plug-in for Last.fm. It collects the information about your favourite artists and bands, finds out where they are from and makes a chart about it.
http://xhochy.org/lastfm-nationstats