Appnr

Userful's Virtualized X-Server (Trial Version)

Userful Multiplier(TM) is a virtualized X-server (multi-seat, multi-station)
that turns 1 PC into ten saving on hardware, maintenance, and power costs.
Simply add extra video cards and connect up to ten monitors, keyboards and
users. Easy graphical configuration tools walk you through setup and
linking of screens and keyboards.

The product is a trial version with a nag screen. To get rid of the nag
screen, end-users may either register for a free 2 user version for
non-commercial use, or may purchase commercial support for up to 10 users per
PC.

http://www.userful.com/products/userful-multiplier
http://www.userful.com/products/downloads/free-2-user
http://openUserful.sourceforge.net