Mailbrew - Automated email digests from Twitter, Reddit, YouTube & more
Feedbutler - Subscribe to your RSS feeds directly via email!
Taco Digest - Customizable personal email newsletter created from your favorite sources.
follow.it - follow.it gets publishers more followers & recurring traffic, and provides a better reading experience for followers
Blogtrottr - Track RSS feeds and send updates to your email inbox.
FeedBlitz - FeedBlitz is a mega pack solution for social media marketing and RSS feed and subscriber integration.