RSS Feed Hosting Solutions -

Gregarius Gregarius is a web-based RSS/RDF/ATOM feed aggregator
Feed On Feeds Feed On Feeds is a server side, multi-user RSS and Atom aggregator!
Tiny Tiny RSS Tiny Tiny RSS is an open source web-based news feed (RSS/Atom) reader and aggregator.
selfoss selfoss is a multipurpose rss reader, live stream, mashup, aggregation web application.
SimplePie SimplePie is a very fast and easy-to-use class, written in PHP, that puts the simple back into really simple syndication.