FeedTree - Collaborative RSS and Atom delivery using using peer-to-peer multicast. Includes information for readers and publishers.
GeoRSS - Provides details of how to add geographic data to RSS and Atom feeds using Geography Markup Language (GML) or the simplified GeoRSS standards.
Wikipedia: Web Feed - Encyclopedia article on the topic, including benfits, technical definition, and basic information on how to read feeds.
Yahoo Pipes - An interactive feed aggregator and manipulator. List of 'hot pipes' to subscribe to, and ability to create your own (yahoo account required).
What is this RSS, XML, RDF, and Atom Business? - Article from the eNewsletter Journal, including consideration of the likely impact on the online newsletter business. (August 9, 2006)
What is RSS/XML/Atom/Syndication? - Introduction to syndication from the blog of Dave Shea. (May 19, 2004)
Atom Wiki - Work area for writing specifications for syndicating, archiving and editing episodic web sites.
AtomEnabled.org - Atom is a way to read and write information on the web, and is considered a competitor/alternate format to RSs. Basic information about the format as well as on software and services which use or can read Atom data.
How to Make a Good ID in Atom - Advice on constructing ID values from Mark Pilgrim.
RFC 4287: The Atom Syndication Format - Official specification for the XML-based document format that describes lists of related information known as "feeds".
Wikipedia: Atom (standard) - Encyclopedia article about the atom standards, including history, motivation, and a comparison with RSS.
RFC 2447: iCalendar Message-Based Interoperability Protocol (iMIP) - Specifies a binding from the iCalendar Transport-independent Interoperability Protocol (iTIP) to internet email-based transports.
RFC 2446: iCalendar Transport-Independent Interoperability Protocol (iTIP) - Specifies how calendaring systems can use iCalendar objects to interoperate with other calendar systems.
RFC 2445: Internet Calendaring and Scheduling Core Object Specification (iCalendar) - Official specification for the format, including full syntax and recommendations.
Wikipedia: iCalendar - Encyclopdia article on the format, with an overview of the specifications, and details of various implementations.
CaRP: Caching RSS Parser - Free PHP script to integrate RSS newsfeeds into webpages. Features flexible formatting, caching for speed, and includes proxy server support.
Dave Winer's RSS Weblog - Weblog that covers new developments in the field of RSS.
MagpieRSS - A XML-based RSS parser in PHP. Supports most RSS versions including Userland RSS and RSS 1.0. Supports modules, and namespaces.
Network World Fusion's Do-It-Yourself RSS Feed - Instructions for creating RSS feeds on any topic covered by Network World and Network World Fusion.
RDF Rich Site Summary (RSS) - News and history of RSS. By Robin Cover, XML Cover Pages, OASIS.
RSS 2 PDF - An online utility that can convert RSS feeds into PDF files.
RSS Compendium - News, resources, tools and links.
RSS DevCenter - A collection of essays and guides to RSS, from O'Reilly, the technical book publisher.
RSS General - Explains the RSS format and its uses, including the creation of feeds.
RSS in Government - News about how RSS is being used by international, federal, state, and local governments.
RSS Specifications - Information related to RSS and XML, including software, newsreaders, specifications, content syndication, and the history of rss.
RSS Suite - Four separate RSS/Atom online tools including a browser-based feed reader, an email-to-RSS service and a submission service.
The RSS Weblog - A blog that covers all things RSS. Updated multiple times a day.
RSS4Medics - An explanation of how RSS can be used in medical research. Includes a directory of medical RSS feeds.
W3C RSS 1.0 News Feed Creation How-To - Guide offers a simple way of creating RSS 1.0 news feeds from one's W3C related domain, activity or working group home page.
Web Reference: RSS - A collection of RSS resources by Web Reference.
XML Tools: RSSApplet - This site contains XML tools for web masters, for instance the RSSViewerApplet for displaying RSS headlines in an HTML page.
Yahoo! Publisher's Guide to RSS - Provides a five-step process to support effective RSS publishing on the Web.
zShaped and zFeeder - zShaped is a tool to post (syndicate) news (content) on your site. zFeeder is a tool to show other's RSS content on your site, or use it on your PC or intranet as a news reader.
What is RSS? - A how to covering all the various versions of RSS. (December 18, 2002)
LLRX.com - RSS for Non-Techie Librarians - Steven M. Cohen explains RSS with illustrated examples. (2002)
RSS: Lightweight Web Syndication - RSS, a simple XML application to describe web site headlines, has had such enormous success that it has been pulled in many directions. By Rael Dornfest, XML.com. (July 17, 2000)
Registering and Publishing with RSS - Explains how to register your RSS file with one of the news syndication sites (July 3, 2000)