Are you looking to do virtual desktops or an terminal services style solution? As Dave says, check out Citrix - XenApp (Terminal Services), XenDesktop (Virtual Desktops) or even VDI in a Box (Virtual Desktops, but simpler and
perhapsĀ not as scalable as XenDesktop)
You've also got RDS 2012 which is looking surprisingly decent.
EDITED: 7 Mar 2013 14:45 by HERMAND