X.Org Foundation: www.x.org [1]
Window Managers for X: www.xwinman.org [2]
GNOME: www.gnome.org [3]
KDE: www.kde.org [4]
NoMachine: www.nomachine.com [5]
FreeNX: freenx.berlios.de [6]
Cygwin: www.cygwin.com [7]
IGEL: www.igel.com [8]
Links:
[1] http://www.x.org
[2] http://www.xwinman.org
[3] http://www.gnome.org
[4] http://www.kde.org
[5] http://www.nomachine.com
[6] http://freenx.berlios.de
[7] http://www.cygwin.com
[8] http://www.igel.com