nComputing devices deliver a virtual session on whatever monitor they are plugged in to. Their host machine can be anything from a powerful server to a regular desktop (number of clients will vary depending on host power). They can run windows or linux, use almost no power and can turn a decent desktop into ~20 workstations. They are cheap, silent and simple to configure.
Please email email@example.com if you would like to test it out using the vSpace software.
Buy here for $174.