Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.
Addr - A collective and annotation-focus ePub reader
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Eplee - A simple and beautiful open-source ePub reader
Twitter Bookmarks - Create shortcuts to your favorite users/tweets on Twitter
Buch - A Telegram book reader bot