Gregarius is a web-based RSS/RDF/ATOM feed aggregator, designed to run on your web server, allowing you to access your news sources from wherever you want.
Completely web-based (runs on your web server)
Simple, password-protected, administration and configuration
AJAX powered item tagging
Committed to web standards: renders XHTML/CSS, supports OPML
Gregarius is FREE software and is released under the GPL