The GNOME Shell, once one of the most popular and best loved desktop environments, has not been so popular lately with users. It’s still used widely in Linux distros, and there are forks of it used in Ubuntu and Mint as well, and the fourth release of the 3.X line is now available.
3.6 has been in development for a little while, and along with general performance increases and more discreet animations, there’s also been some minor visual changes. One of the most notable changes is the replacing of the App Tab in the overview with a phone inspired nine-dot square. There’s also a new lock screen, and the GDM now runs as a dependency.
You’ll also be able to get the new version of Nautilus, although many users are worried about the simplification of the file manager. You can download the source for GNOME now from GIT.