From RSSOwl Development Team:
RSSowl for Linux is a free RSS, RDF, or Atom Newsreader in Java using SWT as fast graphic library. Supported OS are Windows, Mac, Linux and Solaris. Some features are export of news to PDF, Import or Export with OPML and the full text-search with syntax highlight. For easy execution, a .exe is provided on Windows, a shell-script on Linux or Solaris and the Mac version is deployed in an application bundle. RSSOwl comes with a huge list of sample favorites.