Knox - Knox offers easy disk image encryption and comes with a built-in backup service.
ElectronMail - Unofficial desktop app for ProtonMail and Tutanota end-to-end encrypted email providers
Exocet - Exocet creates a Folder on your System.
Mailvelope - Mailvelope open source project. OpenPGP in your browser.
R-Crypto - R-Crypto is smart data security and disk encryption software that allows you to secure your sensitive information via strong encryption.
ProtonMail - Secure email with absolutely no compromises. Get your free encrypted email account today.