Ubuntu lightdm login screen!

Problem

You want to customise your login screen.

Solution

Checkout lightdm "greeters". Below is an example of "crowd-greeter".

Instructions to install it can be found here:
http://www.iloveubuntu.net/lightdm-receives-new-experimental-3d-character-based-greeter-ubuntu-1110

I haven't found a single site which lists available greeters. Thanks go to Robert Ancell for this list of greeters:

GTK+ – https://launchpad.net/lightdm-gtk-greeter

GtkBuilder – http://lxde.git.sourceforge.net/git/gitweb.cgi?p=lxde/ldm-gtk-builder-greeter;a=summary

Webkit – https://launchpad.net/lightdm-webkit-greeter

Qt – https://launchpad.net/lightdm-qt-greeter

KDE – https://projects.kde.org/projects/playground/base/lightdm

Unity – https://launchpad.net/unity-greeter

Crowd – https://launchpad.net/crowd-greeter

See also:

"SO YOU WANT TO WRITE A LIGHTDM GREETER…" - http://www.mattfischer.com/blog/?p=5

"How to change the LightDM theme/greeter?" - http://askubuntu.com/questions/75755/how-to-change-the-lightdm-theme-greeter