Aggie ? a .NET-based application for reading RSS files. Open source, for Windows and Linux-with-Mono.
AmphetaDesk?a Perl-based desktop reader that runs in the browser. Windows, Linux, and Mac OS versions available.
Blagg?a news aggregator for the Bloxsom weblogging system.
BottomFeeder ? a Smalltalk desktop RSS Reader. Open source, runs on Windows, Mac, and various Unix flavors.
Carmen's Headline Viewer?a shareware news reader client for Windows.
FeedReader ? a freeware application for Windows.
Fetch ? an "Enterprise RSS" client and server system, for internal corporate messaging and information flow.
Friday?a Java front-end for viewing news aggregation sites and site syndication feeds on mobile devices.
The Furrygoat Experience?a PocketFeed for Pocket PC RSS aggregator.
fyuze?acts as a personal news portal for searching, sorting, and sifting daily news from RSS feeds.
Hotsheet?a Java-based desktop news reader. Works on Windows, Mac, Linux, and anything else with a Java Virtual Machine.
InfoSnorkel News Aggregator?a Windows application that aggregates RSS feeds, plus content from sites without feeds.
Klipfolio?a Windows-based desktop news reader. Reads simple XML files that point to RSS feeds.
MulleNewz?a Mac OS X docking RSS reader.
MyHeadlines?a content syndication search engine and news reader that can be integrated into a web site running PHP and MySQL.
myRadio?an extension to Radio Userland aggregation from RSS to any data source, including XML, HTML, and SOAP.
NetNewsWire Lite?an OS X desktop RSS reader, written in Cocoa.
NewsIsFree?a directory of feeds that also allows for personalized news pages.
Novobot?a heavily featured desktop news reader that can also scrape non-RSS'd sites.
Pineapple?a web site news aggregator for Mac OS X.
PocketFeed?an RSS/RDF news aggregator that runs on Pocket PC 2002 PDAs.
Radio Userland?a news aggregator included with a weblog software application for Mac and Windows platforms.
Raissa?a headline and news reader for Newton MessagePad.
Reptile?a P2P project, with RSS reading.
RSS Viewer?a Java-based, open source RSS reader.
Slashdock?a simple Mac OS X application that fetches and updates headlines for the latest postings on Slashdot-compatible sites and RSS-compatible sites.
Straw?a desktop news aggregator for the GNOME environment, with project information, news, and downloads.
Tinderbox?a Mac OS feed reader.