I'm a bit all over the free and open source software ecosystem. I have mostly been involved in the development of GNU Octave, OctaveForge image package, and BioPerl. I was the leader of the OctaveForge project for 7 years, authored multiple dzil plugins, contributed to the gedit text editor, BioFormats, and ImageJ. I have packaged to Debian and Fedora. The list could go on.