There are three sides to the cloud:

1. The authoring tool. I edit and update a feed. It contains a element that says how a subscriber should request to notification of updates.

2. The cloud. It is notified of an update, and then in turn notifies all subscribers.

3. The subscriber. A feed reader, aggregator, whatever -- that subscribes to feeds that may or may not be part of a cloud.

ZebraFeeds is a web-based RSS/ATOM aggregator.
With ZebraFeeds, you can aggregate news from your subscribed newsfeeds into one or more pages.

* Supports ATOM/RSS/RDF feeds (through MagpieRSS)
* Output customizable by templates
* Administration interface (with cookie or server-based authentication)
* Share and republish feeds by RSS and Javascript
* Support for podcasting and videocasting (RSS enclosures)
* Supports refreshing feeds by scheduled task (cronjob)
* News sortable by channel or by date (with news selection options, based on date or keywords)
* Uses only flat-text-files, and works without SQL database

A powerful and extensible .NET web content syndication framework for RSS, Atom, OPML, APML, BlogML, RSD and more. The Argotic Syndication Framework is a Microsoft .NET class library framework that enables developers to easily consume and/or generate syndicated content from within their own applications. The framework makes the reading and writing syndicated content in common formats such as RSS, Atom, OPML, APML, BlogML, and RSD very easy while still remaining extensible enough to support common/custom extensions to the syndication publishing formats. The framework includes out-of-the-box implementations of the most commonly used syndication extensions, network clients for sending and receiving peer-to-peer notification protocol messages; as well as HTTP handlers, modules, services and controls that provide rich syndication functionality to ASP.NET developers.

Getting RDF data on the web can be hard to convince people to do, or to do correctly (see RSS). This service helps convert formats as need be and lets you access embedded RDF via GRDDL (such as microformats when they have a transformation) without the need to pre-process it yourself.

Everything that Triplr generates is available via a simple GET at a URI, so you can cut and paste them, 'wget' or 'curl' them and thus easily get the data into into your own web application without additional code.

So you want to write a program to read RSS and Atom syndicated feeds. Sounds simple enough. After all, RSS stands for "Really Simple Syndication" (or "Rich Site Summary", or "RDF Site Summary", or something), and Atom is just RSS with different tag names, right? Well, not exactly.

SimplePie is a very fast and easy-to-use class, written in PHP, for reading RSS and Atom syndication feeds. By keeping it simple, and focusing on what’s important, we’ve built a pretty sweet little API. SimplePie’s focus has been two-fold: speed and ease of use, and has been very successful on both fronts.

"Media RSS" Specification Version 1.1.1
An RSS module that supplements the element capabilities of RSS 2.0 to allow for more robust media syndication.

The Google data APIs ("GData" for short) provide a simple standard protocol for reading and writing data on the web. GData combines common XML-based syndication formats (Atom and RSS) with a feed-publishing system based on the Atom publishing protocol, plus some extensions for handling queries.

People who generate syndication feeds have a choice of feed formats. As of mid-2005, the two most likely candidates will be RSS 2 and Atom 1.0. The purpose of this page is to summarize, as clearly and simply as possible, the differences between the RSS 2 and Atom 1.0 syndication languages.