IndieWeb Summit 2018 took place a few weeks ago in Portland, OR, and my project on day two was to create a service called Indiepaper, which is a "read it later" service for the IndieWeb. Indiepaper makes use of Mercury by Postlight Labs under the hood to extract article content and then publish it to a Micropub destination for later reading. Indiepaper is open source and is deployed on AWS Lambda using the Zappa framework. The Indiepaper website includes a tool to create a Bookmarklet for your web browser, and a Workflow for iOS that adds system-wide support for sending links to Indiepaper.
In order to make Indiepaper even easier to use, I created Indiepaper for macOS, which adds system-wide sharing support for Indiepaper to macOS. Here is a quick video demo of Indiepaper for macOS in action. Indiepaper for macOS is also open source, so feel free to poke around in the source code, and submit pull requests if you have improvements!