nxlog - NXLog offers log management solutions for companies of all sizes.
TinyWall - Lightweight and non-intrusive firewall
Splunk - Splunk's operational intelligence platform helps unearth intelligent insights from machine data.
SonicWall - SonicWall security solutions protects your network, systems, users and data from cyber threats.
Graylog - Graylog is an open source log management platform for collecting, indexing, and analyzing both structured and unstructured data.
pfSense - pfSense is a free and open source firewall and router that also features unified threat management, load balancing, multi WAN, and more