Blogtrottr - Track RSS feeds and send updates to your email inbox.
RSS.app - Monitor the web the way YOU want to.
Newspipe - Newspipe is a web news aggregator and reader.
FetchRSS - Generate RSS out of any website.
Mailbrew - Automated email digests from Twitter, Reddit, YouTube & more
FiveFilters Feed Creator - Create feed from elements (e.g. links) extracted from a given web page