FeedFury - FeedFury was a powerful RSS supportive tool that helped to manipulate or to retrieve content data from multiple web feeds by functioning as an XML directory, the reader, and the aggregator.

Newsletter Operating System - All-in-one dashboard to launch & grow your newsletter

Kouio - Kouio is an RSS reader-based tool that allows quick reading efficacy with multiple websites, articles, or news stories, and more with comprehensive study or basic options to explore the content.

Letterfuel - Grow your audience with a curated newsletter

Reedah - Reedah is an alternative to the Google reader that allows users to read the content of various websites, blogs, stories, articles, and many more with RSS-based aggregator efficacy.

Newsletter Resources Kit - A resources kit to launch, grow, & monetize your newsletter