Polymail - Native email app for email productivity.
Microsoft BitLocker - BitLocker is a full disk encryption feature included with Windows Vista and later.
Spark Mail - Spark helps you take your inbox under control. Instantly see what’s important and quickly clean up the rest. Spark for Teams allows you to create, discuss, and share email with your colleagues
Paubox - Paubox provides HIPAA compliant email encryption without the hassle of extra steps.
Airmail - Airmail is a lightweight and lightning fast mail client for Mac.
OpenSSH - OpenSSH is a free version of the SSH connectivity tools that technical users rely on.