The best open source alternative to Google Reader is QuiteRSS. If that doesn't suit you, our users have ranked more than 100 alternatives to Google Reader and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Google Reader are NewsBlur, CommaFeed, FreshRSS and RSS Guard.
QuiteRSS is a open-source cross-platform RSS/Atom news feeds reader written on Qt/C++
OPML file uploads that actually work, cool label features.
NewsBlur is a personal news reader that brings people together to talk about the world. It shows you the original site and allows you to read stories directly off the site while keeping track of what you read. It also filters and highlights stories you like and dislike.
Highly customizable interface!
Newsblur is fantastic - handles the simple task of keeping track of many feeds very well. Also has many features, like multiple methods of displaying posts, training it to highlight the posts that matter most, lots of organization & filtering methods, etc.
Integrated sharing and threaded commenting. Because it's a paid service, it doesn't share / sell your personal information, good mobile apps and compatibility with third-party apps.
FreshRSS is a free, self-hosted RSS aggregator. It is quite lightweight, fast (it can manage +100k articles without complaining) and powerful (e.g. shortcuts, filters, responsive design, multi-views, multi-themes, multi-users, statistics, provides a Google Reader API, etc.)
great features, self-hosted, big community, mobile friendly, light
RSS Guard is simple, light and easy-to-use RSS/ATOM feed aggregator developed using Qt framework which supports online feed synchronization.
Liferea is a web feed reader/news aggregator that brings together all of the content from your favorite subscriptions into a simple interface that makes it easy to organize and browse feeds.
It's very light and required only few additional dependencies in my system (linux mint 17.1)
RSS reader shows you articles from your favorite blogs and news sites, and it keeps track of what you’ve read.
Completely free, no ads, simple to use, great UI, and no cons whatsoever!
Feedbin is a modern web reader to follow websites, Twitter feeds and email newsletters in one place. It boasts a clean interface, is ad-free, and costs $5/month.
Akregator is a news feed reader. It enables you to follow news sites, blogs and other RSS/Atom-enabled websites without the need to manually check for updates using a web browser. Akregator is designed to be both easy to use and to be powerful enough to read hundreds of news...
The News app is an extension to Nextcloud. Essentially it is an RSS/Atom feed aggregator and offers a RESTful API for app developers. There are several clients, also for mobile devices.
Brief is a light-weight feed reading extension for Mozilla Firefox . Designed to be easy to use and streamlined, with exactly the right set of features.
Russia
United States
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EU
Czechia
Germany
Small, quick, cross-platform (including BSD!!!)