An expensive X Server for MicrosoftWindows. However, with the use of Exceed3D, it supports the GLX extensions, something which few other X Servers on MicrosoftWindows seem to be able to do.
This lets me run my discreet backdraft software remotely on my PC. Of course, when I an in Linux, GLX is supported by XFree86.
2 pages link to HummingbirdExceed: