From Drupal and Moodle, right through to a Git versioning system and Perl modules on CPAN, we contribute back to over 175 community open source projects. This list is in order of the number of projects contributed to.
Mozilla Central (only)
https://www.openhub.net/p/firefox includes old cvs repos. I made this project to check mozilla-central repo only.
This Perl script will display the current status of your MythTV system at the command line. It can optionally append it to the system message of the day (MOTD) on a regular basis (setup by default on Debian, and Debian derived distros).
naive adjacency matrix implementation
an NCIP server, from the Evergreen ILS project http://evergreen-ils.org
Perl module Net::AS2 implementing AS2 file transfer protocol
Perl5/Moose wrapper for Net::SSLeay (OpenSSL SSL library bindings)