Scapy - Scapy is a powerful interactive packet manipulation program.
PuTTY - Popular free terminal application. Mostly used as an SSH client.
Winsock Packet Editor - WPE Pro is a packet editor.
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
packeth - packeth is GUI and CLI packet generator tool for ethernet.
iTerm2 - A terminal emulator for macOS that does amazing things.