POLAR - A powerful document manager for Mac, Windows, and Linux for managing web content, books, and notes and supports tagging, annotation, highlighting and keeps track of your reading progress.

Alfread - Actually read articles saved for later

Periodical - This application calculates the fertile days according to Knaus-Ogino.

Matter - Create a feedback-focused culture in Slack with Matter!

Always Reading - Queue up articles and schedule when you want to read them.

Instapaper - Instapaper is a simple tool to save web pages for reading later.