"DASe (Digital Archive Services) is a lightweight digital asset repository."

"Real-time feed parsing in the cloud. Why build a complex feed fetching and parsing infrastructure when you could just use Superfeedr?"

"Google Feed Server is an open source Atom Publishing Protocol server based on the Apache Abdera framework. Google Feed Server provides a simple back end for data adapters, which allows developers to quickly deploy a feed for an existing data source such as a database"

awesome! you can consolidate about 90% of the current push apps in the iPhone store with this one. (in theory at least)

"A simple, open, web-hook-based pubsub protocol & open source reference implementation."

On the fence about this right now... but feed consumers have to do something. I was wrestling with similar issues when spec'ing out a system to collect feeds (yes, millions per hour) for an internal linguistics project... in the current environment HTTP If-Modified-Since just isn't enough.

LiveJournal's idea of an Atom push server at the time.

"AtomServer is a generic data store implemented as a REST-ful web service." Hooray!

"The OpenSearch response elements can be used by search engines to augment existing XML formats with search-related metadata."

outdated but perhaps useful... i'm such a packrat.

"A class to wrap Mark Pilgrim's Universal Feed Parser module so that parameters can be used to cache the feed results locally instead of fetching the feed every time it is requested. Uses both etag and modified times for caching. The cache is parameterize

"A stripped-down implementation of the server side of the Atom Publishing Protocol as an Apache module, implemented in C"

Planet is a lovely bit of Python software that aggregates RSS/ATOM feeds together by date. This is an article that describes how to setup the software.