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.
Blinkist - Key insights from 6,000+ bestselling books and podcasts
Periodical - This application calculates the fertile days according to Knaus-Ogino.
Instaread - Read or hear key takeaways of any book in minutes
Always Reading - Queue up articles and schedule when you want to read them.
12min APP - Free reading app for summaries of nonfiction books.