Win10Pcap - Win10Pcap is a WinPcap-based Ethernet packet capture library.
Technitium MAC Address Changer - Technitium MAC Address Changer (TMAC) is a freeware utility to instantly change or spoof MAC Address of any network card (NIC).
Npcap - Npcap is the Nmap Project's packet sniffing library for Windows.
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.
Wireshark - Wireshark is a network protocol analyzer for Unix and Windows. It lets you capture and interactively browse the traffic running on a computer network.
Zabbix - Track, record, alert and visualize performance and availability of IT resources