Keybase Chat - End-to-end encrypted chat built into Keybase
Microsoft BitLocker - BitLocker is a full disk encryption feature included with Windows Vista and later.
Seald - Keep your conversations secure, everywhere.
Paubox - Paubox provides HIPAA compliant email encryption without the hassle of extra steps.
Crypho - End-to-end-encrypted messaging and file sharing
OpenSSH - OpenSSH is a free version of the SSH connectivity tools that technical users rely on.