Xwin32 allows you to run UNIX X applications on your PC. You can run Xwin32 directly, or to get a secure connection, you can connect to the UNIX machine via ttssh and then run X apps through Xwin32.
Then start X programs as usual from that xterm. You can find the IP
address of the PC by double-clicking on the 'X' in Windows' lower
right corner information bar and looking under 'Display'.
This is useful when the secondary machine will not accept an outside
connection but you can connect from the intermediary machine.