MailStore - MailStore Home - A 100% free single-private-user desktop solution
Symantec Data Loss Prevention - Fully protect your data with the comprehensive detection technologies and unified policies of Symantec's industry leading Data Loss Prevention (DLP).
Gmvault - Backup the emails in your Gmail account.
OpenSSH - OpenSSH is a free version of the SSH connectivity tools that technical users rely on.
Mail Backup X - Your one stop mail backup and archiving tool for Mac.
Paubox - Paubox provides HIPAA compliant email encryption without the hassle of extra steps.