Liferea 
RSS/RDF news aggregator for GNU/Linux. Its intended to be a FeedReader clone.
http://liferea.sourceforge.net/Snownews
Text mode RSS reader for Linux and Unix, available in multiple languages.
http://kiza.kcore.de/software/snownews/
gfeed
A gtk+-2.0 based RSS/RDF feed reader. Supports most basic RSS/RDF feeds that do not include html.
http://sourceforge.net/projects/gfeed
aKregator
A open-sourced feed reader for KDE/Qt. Runs on Linux or UNIX.
http://akregator.kde.org
Straw
A desktop news aggregator for the GNOME environment. With project information, news, and downloads.
http://www.gnome.org/projects/straw/
