GnuPG

GnuPG allows to encrypt and sign your data and communication, features a versatile key management system as well as access modules for all kinds of public key directories.

Free Open Source Mac OS X Linux Xfce OpenPGP

GPG4Win

gpg4win is an installer package for windows (2000/xp/2003/vista) with computer programs and handbooks for email and file encryption. both relevant cryptography standards are supported, https://alternativein .

Free Open Source Windows S/MIME GnuPG

GPGTools

Use GPG Suite to encrypt, decrypt, sign and verify files or messages. Manage your GPG Keychain with a few simple clicks and experience the full power of GPG easier than ever before.

Free Open Source Mac OS X GPG Suite

GPG Suite

gpg for mail is an open source plugin for apple mail. encrypt, decrypt, sign and verify mails using openpgp with a few simple clicks. gpg keychain is an open source application for mac os x.

Free Open Source Mac OS X GnuPG

Kleopatra

Kleopatra is a certificate manager and GUI for GnuPG. The software stores your OpenPGP certificates and keys.

Free Open Source Windows Linux GnuPG

Outlook-Privacy-Plugin

Outlook Privacy Plugin is a security extension for Outlook 2010. It enables Outlook 2010 to send and receive email messages that are encrypted and/or signed with the...

Free Open Source Windows Microsoft Office Outlook GnuPG

PGP Tool

PGP for Windows, MacOS and linux. Desktop application to encrypt and decrypt PGP files. It's free and easy to use. OpenPGP compatible.

Free Open Source Windows Linux Mac

Paubox

Paubox provides HIPAA compliant email encryption without the hassle of extra steps. Just send emails like normal from any device.

Commercial Mac OS X Windows Android iPhone Web Blackberry Windows RT Windows Mobile

iGPMail

iPGMail is an app that implements the OpenPGP standard (RFC 4880, RFC 6637) and allows the user to create and manage both public and private (RSA, DSA, ECDSA) PGP keys...

Commercial

Symantec Desktop Email Encryption

Desktop Email Encryption provides an end-to-end email encryption solution that automatically encrypts and decrypts email directly from one user's client to...

Commercial Windows

GNUPGK

A GnuPG Frontend GUI made in C#. It is compatible with PGP as well so it can be a very useful tool for encryption/decryption. It also incorporates a shell extension so...

Free Open Source Windows OpenPGP

oPenGP

oPenGP is a solution to support OpenPGP standard (RFC 4880) on your iOS device.

Commercial