ProtonMail - Secure email with absolutely no compromises. Get your free encrypted email account today.
Kleopatra - Kleopatra is a certificate manager and GUI for GnuPG.
Mailvelope - Mailvelope open source project. OpenPGP in your browser.
OpenKeychain - OpenKeychain helps you communicate more privately and securely.
Tutanota - Get your encrypted mailbox for free.
APG - Android Privacy Guard (APG) is a free and open source application for ...