Grr RSS Reader
Grr (Günther's RSS Reader) is an RSS Reader application for GNUstep and OSX.
I stopped working on it a while ago. It's now maintained by the GNUstep Application Project (GAP), which is really nice of them. :)
If you're using Debian, you can use the official package, rssreader.app
:
sudo apt-get install rssreader.app