PuTTY is relatively portable, has just enough of a GUI to not require you use cmd.exe to run it, and is not GPL-ware. (To be clear, I have nothing against the

PuTTY is relatively portable, has just enough of a GUI to not require you use cmd.exe to run it, and is not GPL-ware. (To be clear, I have nothing against the GPL, but some corporate environments avoid it like the plague.)