OpenKeychain

OpenKeychain helps you communicate more privately and securely.

APG

Android Privacy Guard (APG) is a free and open source application for …

Convenient End-to-End Encryption for E-Mail

Bridge is a program designed to help designers come together despite their background to manage new projects.

Unofficial desktop app for ProtonMail and Tutanota end-to-end encrypted email providers

Security extension to Mozilla Thunderbird and SeaMonkey

Use GPG Suite to encrypt, decrypt, sign and verify files or messages.

GPGMail is an open source plugin for Apple Mail.

GnuPG is a complete and free implementation of the OpenPGP standard as defined by RFC4880 (also known as PGP).

Kleopatra is a certificate manager and GUI for GnuPG.

Mailvelope open source project. OpenPGP in your browser.

Multiple timezones on one simple dial

OnionMail the TOR encrypted Mail Server

End-to end encrypted email service with no stored metadata

Get your encrypted mailbox for free.

Free email service with no ads and no strings attached. Also contacts and calendar features.