Thunderbird is a open source mail client developed and maintained by Mozilla foundation.

Feedbin is an open source feed reader.

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

Tiny Tiny RSS is an open source web-based news feed (RSS/Atom) reader and aggregator.

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

Icedove is an unbranded Thunderbird mail client suitable for free distribution.