Pears is a three-pane newsfeed (RSS/RDF and Atom) aggregator which caches downloaded feeds for offline use. It has a clean, uncluttered interface, it's easy to use and works on Windows, Linux and MacOSX. 

{{http://project5.freezope.org/pears/img/pears16winxp.png}}

http://project5.freezope.org/pears/