UNIX Sysadmin Resources – X Terminals, Thin Clients, and Network Computers
GraphOn, makers of thin client PC X servers, thin client X servers for java and multi-user NT.
IGEL X terminals (and more). English- and German-language pages.
neoware (formerly Human Designed Systems), makers of thin-client java terminals and network computers.
Netvoyager Windows CE and Linux based thin client terminals supporting X-Windows and terminal emulation in addition to RDP and ICA protocols.
Network Computing Devices (NCD), thin clients and java stations, PC X servers
Tektronix, thin clients and network computers
See also the X11 section of this site.