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.
Literal - Track your reading and discover your next favourite book
Periodical - This application calculates the fertile days according to Knaus-Ogino.
12min - Your free habit builder for reading
Always Reading - Queue up articles and schedule when you want to read them.
ReadingGoals - Tackle your "Read Later" bookmark debt in 2020