PolitePol - Online tool for creation of RSS feeds for any web page
FeedWind - FeedWind is the world's leading RSS widget, Facebook widget and Google Calendar widget - works on any website and is fully customizable
follow.it - follow.it gets publishers more followers & recurring traffic, and provides a better reading experience for followers
Feedly - The content you need to accelerate your research, marketing, and sales.
Feedbutler - Subscribe to your RSS feeds directly via email!
Superfeedr - Real-time feed API - RSS and Atom over PubSubHubbub and XMPP. Superfeedr pushes RSS feeds in real-time for both publishers and subscribers, with open protocols and APIs.