Feed on Feeds, your server side, multi-user Atom and RSS aggregator. Feed on Feeds tells that why a server side aggregator is better than a desktop aggregator. It keeps track of what items you've read, and keeps happily checking up on your feeds no matter where you are.  Whenever you want to see what's new, you just bring up a web page and scan the newest items.  You can mark the items as read so they won't be shown again.  Or, you can just always show the most recent N items, like the way LiveJournal's friends pages work.  Also, having the aggregator in your browser eliminates the "impedance mismatch" that sometimes occurs between a desktop aggregator and your browser.  All your native browsing methods work on a FEED ON FEEDS page. Open pages in new tabs, bookmark them for later, browse whatever way you like.

Requirements:
- Access to a server running PHP 4.3.2 or later with the PCRE and XML extensions available, as well as MySQL.
- Support for compressed feeds requires the Zlib extension.
- Support for https and digest authenticated feeds requires the cURL extension, at least version 7.10.5.
- Support for feeds in international language encodings requires the mbstring and/or iconv extensions.