WatchGuard XTM - Discontinued Product - WatchGuard Technologies is strongly committed to providing industry-leading products and services.
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
DataSunrise Database Security - DataSunrise Database Security Software secures the databases and data in real-time with high performance.