Eplee - A simple and beautiful open-source ePub reader
cheat - Cheat allows you to create and view interactive cheatsheets on the command-line.
FolioReaderKit - A Swift ePub reader and parser framework for iOS.
cheat.sh - The only cheat sheet you need Unified access to the best community driven documentation
Buch - A Telegram book reader bot
explainshell - Match command-line arguments to their help.