Hackr.io - There are tons of online programming courses and tutorials, but it's never easy to find the best one. Try Hackr.io to find the best online courses submitted & voted by the programming community.
Eplee - A simple and beautiful open-source ePub reader
Google's Python Class - Assorted educational materials provided by Google.
FolioReaderKit - A Swift ePub reader and parser framework for iOS.
Think Python - Learning Resources
Buch - A Telegram book reader bot