Check Point Firewall Software Blade - Check Point delivers the best security solutions withthe right architecture to prevent attacks in allof yourenvironments.

Axcient - Axcient is a cloud platform that eliminates data loss, keeps apps up and running, and ensures a non-failing IT infrastructure.

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

DeviceLock DLP - DeviceLock provides DLP solutions protecting organizations from data leak threats.

ClearOS - A very good alternative for Windows Server, for free

Cavirin - Cavirin provides security management across physical, public, and hybrid clouds, supporting AWS, Microsoft Azure, Google Cloud Platform, VMware, KVM, and Docker.