Kindle Robot - Send books to Kindle via a Telegram bot 📚🤖
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
Eplee - A simple and beautiful open-source ePub reader
Shutter - Shutter is a feature-rich screenshot program.
FolioReaderKit - A Swift ePub reader and parser framework for iOS.
MWSnap - MWSnap is basically a free to use Windows snapping tools that are used for snapping any part of the screen that is currently displaying on the front of all opened programs and windows.