NetNewsWire is a free and open-source RSS reader for macOS and iOS, originally developed by Brent and Sheila Simmons through Ranchero Software.

Ownership transitioned over time, with NewsGator acquiring it in 2005 and Black Pixel in 2011, before Brent Simmons regained the intellectual property in 2018 and released his open source Mac RSS reader, "Evergreen" as NetNewsWire 5.0d1.

[5] The version added Spotlight indexing of news items, integration with iCal, iPhoto, Address Book, and VoodooPad, Growl support, a new user interface, performance enhancements, and more.

An iOS version of NetNewsWire with support for the iPhone, iPod Touch and later for the iPad was released on the first day of the App Store.

On December 22, 2019, Brent Simmons started a public beta for the NetNewsWire iOS app which was distributed through TestFlight.

[17] On March 27, 2021, Brent Simmons released NetNewsWire 6.0 for macOS along with a public beta for iOS which, again, was distributed through TestFlight.

[21] The software received a Macworld Editor's Choice Award in 2003[22] and 2005[23] and maintained a 4.8 out of five stars rating among reviewers at VersionTracker (now CNET).

MacStories praised the RSS reader's search engine and general stability, but lamented that some advanced features and customization options had not made it into the release, calling 5.0 "a solid foundation for the future".