This is a useful listing of wide variety of RSS tools.
Archive for RSS
This is about RSS 1.0 with metadata and topic maps.
This also seems to be an interesting tool for creating customized information sources.
Plagger is a pluggable RSS/Atom feed aggregator written in Perl. Everything is implemented as a small plugin and you can mash them up together to build a new application to handle RSS/Atom feeds. Ray Ozzie said RSS can be Unix Pipe of the Internet and that way Plagger is an Unix shell for Web 2.0
This is a cool way of feeds aggregation.