pfSense - pfSense is a free and open source firewall and router that also features unified threat management, load balancing, multi WAN, and more

Armor - Armor offers cloud security through integrated managed cloud or managed security as a service for public cloud or private cloud.

Cisco ASA - Cisco ASA Software delivers enterprise-class security capabilities for the ASA security family in a variety of form factors.

Zix - Leader in email #security | Easy-to-use solutions for #encryption, DLP, #advancedthreatprotection, archiving and BYOD security | https://t.co/7V5jQ5UfAo

Qualys - Qualys helps your business automate the full spectrum of auditing, compliance and protection of your IT systems and web applications.

Microsoft BitLocker - BitLocker is a full disk encryption feature included with Windows Vista and later.