Xming

Xming screenshots

Xming is the leading X Window Server for Microsoft XP/Vista/Windows7
Multiwindow mode on Microsoft Windows 7
Xming 7.5 : Multiwindow mode on Microsoft Windows 7

Alternative downloads

Ssh Tunnel Easy
It can make an encrypted SSH tunnel between your machine and SSH server host.
1.2.3.2
Putty Toolkit
Set of tools that are part of the PuTTY applications.
1.0
FREE