Pheeder is an extensible Mac desktop news and XML reader.
Pheeder lets you:Tracks read items so you always know when something is new. Stay organized by arranging feeds in drag-and-drop folders. Auto-refresh feeds at user-definable time intervals so new things keep on coming. Set refreshing globably, for folders, or individual feeds. Create dynamic search feeds that filter through your subscriptions and display only the items that match your search. View related website with an integrated, lightweight Web browser. Assign XSLT styles to individual documents. Create plug-ins to read arbitrary XML formats. Read and export to OPML Autodiscover feeds when using integrated Web browser