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ReadMo - Reading mode with an audio player 📖🎧
Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.
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.
Bookmark It - Create awesome notes on YouTube videos
Periodical - This application calculates the fertile days according to Knaus-Ogino.
PageMarker - Save, organize, annotate and revisit your bookmarks