Did I ever told you about MobaXterm? A tool I never want to miss again while working with different remote computers. It includes SSH, Telnet, RDP, FTP, SFTP, VNC, XSERVER and more protocols. It has a Cygwin like Unix shell and is expandable via plugins (e.g. with OpenSSL, Perl, Python etc.).
And it is just one executable file which you can easily copy to every machine where you need it.
Just a great tool!