Kindle Robot - Send books to Kindle via a Telegram bot 📚🤖
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Eplee - A simple and beautiful open-source ePub reader
Chadder - Encrypted messaging app
Buch - A Telegram book reader bot
Crypho - End-to-end-encrypted messaging and file sharing