Turn Mastodon into your feed reader. Mention @birb@rss-parrot.net in a toot with the address of the site you want to follow. RSS Parrot looks up the link in your toot, reads the website, and retrieves the address of its RSS or Atom feed. If this is the first time the site is requested, RSS Parrot creates a new account dedicated to it. This account will send out a new toot every time a new post appears in the feed. The account's name is derived from the website's address, using only dots between the letters.
Collie is a minimal RSS feed reader application. With Collie, you can:
All you need is a local machine and the Internet. No virtual machine, no cloud infrastructures, no always-on database, and no account registration with privacy information required.
Selfoss is a personal RSS feed reader written in PHP. The idea is that you install it into a subdirectory of your website or on your laptop, configure it, and use it to read RSS feeds in the same way that you'd use Google Reader (RIP). Can be easily extended with plugins. Supports mobile devices as well as desktop web browsers. Can also import existing OPML feeds (like Google Reader's) to populate the database with what you read. Tiny - 2MB in size.