Kleopatra - Kleopatra is a certificate manager and GUI for GnuPG.
Microsoft BitLocker - BitLocker is a full disk encryption feature included with Windows Vista and later.
Enigmail - Security extension to Mozilla Thunderbird and SeaMonkey
Paubox - Paubox provides HIPAA compliant email encryption without the hassle of extra steps.
OpenKeychain - OpenKeychain helps you communicate more privately and securely.
OpenSSH - OpenSSH is a free version of the SSH connectivity tools that technical users rely on.