Axence netTools - Axence netTools is completely free of charge, both for home and commercial use – all you have to do is to register. A tool for professionals – and others.
TinyWall - Lightweight and non-intrusive firewall
Zabbix - Track, record, alert and visualize performance and availability of IT resources
GlassWire - Visualize network activity in detail, get notified when new apps access the network, look out for...
Spiceworks - Spiceworks bundles network monitoring, helpdesk, UPS power management, PC inventory tools, an online community, and much more for free
Windows Firewall Control - Windows Firewall Control is not the built in firewall system in the Windows operating systems.