UltraVNC Viewer is an Open Source Portable VNC Viewer. This Virtual Network Computing (VNC) application can be stored on and launched directly from your USB flash device. Used to display the screen of another computer (via internet or a local network) on your own screen. You can then remotely administer the computer using your local mouse and keyboard.
Portable VNC – Ultra VNC Viewer
Authors Website: http://uvnc.com
License: Open Source
Download: You can grab the UltraVNC stand alone zip HERE