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
Silverback - Silverback 3
iTerm2 - A terminal emulator for macOS that does amazing things.
Babun - pact - advanced package manager (like apt-get or yum). xTerm-256 compatible console. HTTP(s) proxying support. Plugin-oriented architecture. Pre-configured git and shell.