The infoRSS Project
- A lightweight RSS, ATOM, NNTP and HTML headlines reader for Firefox, Mozilla, SeaMonkey, Netscape and Thunderbird. Download, FAQ, screen shots, and Flash movie demos.
- http://inforss.mozdev.org/

Feedjack
- Feed aggregator written in Python and Django. Supports archives, tag clouds, multiple sites and themes.
- http://www.feedjack.org/

Yoono
- A RSS reader/builder integrated into a social bookmarking application based on browser bookmarks. Includes a search engine, web monitoring and sharing functions.
- http://www.yoono.com/

myRadio
- Extension to Radio Userland aggregation from RSS to any data source, including XML, HTML, and SOAP.
- http://brainoff.com/weblog/outlines/myRadio/

CafeRSS
- Information and download for an RSS aggregator using PHP.
- http://barkerjr.net/webdesign/CafeRSS/

Pears
- Three-pane newsfeed (RSS/RDF and Atom) aggregator which caches downloaded feeds for offline use. It has a clean interface, and works on Windows, Linux and Mac OSX.
- http://project5.freezope.org/pears/index.html

QuikView Channel Viewer and Bookmark Server
- Full channel RSS / XML viewer and bookmark server. A portable, cross-platform, sidebar application. Able to read all RSS versions.
- http://quikonnex.com/start/

RSS-Planet
- A program that displays RSS items based upon their geographical location on a map of the world. Requires xplanet or OSXplanet.
- http://home.arcor.de/mdoege/rss-planet/

Rocketinfo Desktop
- Search software for finding and sharing news with integrated solid RSS newsreader.
- http://www.rocketinfo.com/

NewsFeed
- A desktop RSS reader and aggregator in Python/Tk.
- http://home.arcor.de/mdoege/newsfeed/

Rawdog
- An aggregator written in Python that supports RSS 0.9, 1.0, 2.0, CDF and Atom feeds.
- http://offog.org/code/rawdog.html

RssDisplay
- A quick Perl CGI to render an RSS feed in HTML for use in SSI on sites. This script does that very simply, yet with a small set of configurable options.
- http://www.decafbad.com/twiki/bin/view/Main/RssDisplay

Pluck
- A tool that automatically retrieves RSS feeds then delivers the results for scanning and customized sorting.
- http://www.pluck.com/

Feed on Feeds
- A Free PHP/MySQL based server-side RSS and Atom aggregator. All feeds are in one place, and users can read the latest news wherever they are.
- http://feedonfeeds.com/

Planet
- Server software that combines several feeds together and publishes them together on one web page.
- http://www.planetplanet.org/

MyHeadlines
- Content syndication search engine and news reader that can be integrated into a website running PHP and MySQL.
- http://www.jmagar.com/myh4/

Wizz RSS News Reader
- A simple RSS news reader extension for Firefox. Reads all versions of RSS. i.e. 0.90, 0.91, 0.92, 0.93, 1.0 (RDF) and 2.0.
- http://www.wizzcomputers.com/WizzRss.php

Sage
- RSS and Atom feed aggregator extension for Mozilla and FireFox browsers.
- http://sage.mozdev.org/

Mercury News Readers
- Displays RSS, RDF and Atom feeds. Available as screensaver, news ticker, Internet Explorer toolbar, and feed reader application.
- http://oracle.2question.com/rss/

FIRST SAY
- Open source RSS news aggregator designed to build collections of feeds and provide a first page presentation of feeds from many sources.
- http://www.firstsay.org/

phpNewsfork
- Browser-based news channel and Weblog interface based on PHP, XML-RPC, and RSS. It uses the XML-RPC APIs from meerkat.oreillynet.com and syndic8.com, and does not require a database.
- http://www.borho.net/news/about.html

Raggle
- Open-source console-based RSS aggregator, written in Ruby, for Linux, Unix and Windows. Information for users and developers.
- http://www.raggle.org/

Rnews
- Server-side RSS aggregator written in php using MySQL as the back-end and uses magpierss for the RSS parser.
- http://rnews.sourceforge.net/

Parss Project
- The general idea behind Parss is to solve the problem of countless individual (desktop) RSS viewers randomly and redundantly transferring and processing almost exactly the same set of RSS feeds.
- http://weblogs.at/parss/

TheYoke
- A simple RSS aggregator designed for use on the UNIX command line.
- http://www.mackers.com/projects/theyoke/

TALAggregator
- Multi-user web based RSS Aggregator. Caches feeds to MySQL database, handles bad RSS, and includes template driven interface.
- http://www.owlfish.com/software/TALAggregator/

BottomFeeder
- A Smalltalk, desktop RSS Reader. Open source, runs on Windows, Mac, and various Unix flavors.
- http://www.cincomsmalltalk.com/BottomFeeder/

AmphetaDesk
- Free, cross platform, open-sourced, syndicated news aggregator.
- http://www.disobey.com/amphetadesk/