RSSOwl is a news aggregator for RSS and Atom News feeds.

QuiteRSS is a cross-platform RSS/Atom news feed reader written using Qt.

Feeder is a web based RSS feed reader.

Feedbro is a browser extension for Google Chrome that adds local feed reading capabilities to the web browser.

Feedbin is an open source feed reader.

Aktuell is a RSS News Reader for Mac.

Vienna RSS is a coupon and discount store.

ReadKit is a full-featured read later and RSS client that supports services from Instapaper, Pocket, Pinboard, Feedly, Fever, NewsBlur, Feedbin, etc.