Email RSS Aggregator 
Service offering updates delivered direct to an e-mail inbox.
http://era.indecorous.com/Newspipe
An RSS/Atom aggregator which allows the user to keep track of feeds through e-mail.
http://newspipe.sourceforge.net/
RSSknip
A subscription service that tracks user selected keywords over a range of feeds.
http://www.rss-clipping.com/
Feed2Mail
A service that converts an RSS feed into a mailinglist that people can subscribe.
http://www.feed2mail.org
Feed2Imap
A feed aggregator that can download feeds then uploads them to a specified folder of an IMAP mail server.
http://home.gna.org/feed2imap/
