Feedbutler - Subscribe to your RSS feeds directly via email!
Free Twitter RSS Feed Generator - Convert Twitter lists, hashtags & searches into RSS feeds
follow.it - follow.it gets publishers more followers & recurring traffic, and provides a better reading experience for followers
RSS API - Convert & subscribe to RSS, ATOM and JSON-Feeds via API ⚡️ Get webhooks whenever there is a new entry in a Feed.
FeedBlitz - FeedBlitz is a mega pack solution for social media marketing and RSS feed and subscriber integration.
Blogtrottr - Track RSS feeds and send updates to your email inbox.