“Open Source Mac is a simple list of the best free and open source software for Mac OS X. We aren’t trying to be a comprehensive listing of every open-source mac app, instead we want to showcase the best, most important, and easiest to use. This page should be a handy reference and a useful tool for getting more people to start using free and open-source software.”
Cool, they listed XRG in the Quick Links section on the bottom of page 2. There are some really good apps on the rest of the list, so check them out.