Lightdm is a display manager that:
* Is cross-desktop - supports different desktops
* Supports different display technologies
* Is lightweight - low memory usage and fast performance
* Has a comprehensive test suite
WWW: https://www.freedesktop.org/wiki/Software/LightDM/
lightdm-gtk-greeter is the reference GTK+ greeter for LightDM.
WWW: https://launchpad.net/lightdm-gtk-greeter
Approved by: adamw (mentor, implicit)
