Next generation GNOME Display Manager
GDM provides the equivalent of a "login:" prompt for X displays: it asks for a login and starts X sessions.
It provides all the functionality of XDM, including XDMCP support for managing remote displays, and extends it with the ability to start X servers on demand.
The greeter is written using the GNOME libraries and hence looks like a GNOME application - even to the extent of supporting themes!
This package contains the next generation GDM, which was developed using the technologies on which GNOME 3 is based.