PuTTY - Popular free terminal application. Mostly used as an SSH client.
Tiger - The TIGER security tool Homepage
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
Lion - Accountability browser for the modern day
iTerm2 - A terminal emulator for macOS that does amazing things.
Chkrootkit - Chkrootkit is a Linux tool to locally check for signs of a rootkit. It contains: