Kleopatra - Kleopatra is a certificate manager and GUI for GnuPG.

Virtru - Virtru is your data privacy force field, wrapping and protecting emails and files wherever they're shared. Easy-to-use data security software for business. People also askIs Virtru Hipaa compliant?

KeePassXC - KeePass Cross-Platform Community Edition - A community maintained fork of the popular KeePassX...

Paubox - Paubox provides HIPAA compliant email encryption without the hassle of extra steps.

KeePass - KeePass is an open source password manager. Passwords can be stored in highly-encrypted databases, which can be unlocked with one master password or key file.

Encyro - Use Encyro to send sensitive messages and files to your customers and service providers, including accountants, loan officers, health coaches, and others. Stay organized and forward documents from your mobile device.