PuTTY - Popular free terminal application. Mostly used as an SSH client.
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).
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
Npcap - Npcap is the Nmap Project's packet sniffing library for Windows.
iTerm2 - A terminal emulator for macOS that does amazing things.
WinPcap - Industry-standard tool for link-layer network access in Windows.