TightVNC Portable is a popular Open Source VNC Viewer that can be stored and run as a Portable VNC Viewer. Virtual Network Computing (VNC) enables a user to view the desktop of a remote machine and control it with a the mouse and keyboard from a local machine as if you were sitting right in front of the remote computer. In addition to being installable, TightVNC is offered in a zip format which can be extracted to a folder on your USB device. This also makes the VNC Viewer Portable. The program can then be launched from the portable device from any computer.
Note: TightVNC does save it’s changes back to the registry. So if you must avoid leaving any traces behind on the host PC, you’ll need to delete these entries when you finish using the tool:
VNC Viewer Portable TightVNC
Authors Website: http://tightvnc.com
License: Open Source
Download: You can grab the VNC Viewer Portable zip file HERE