Cinnamon

Cinnamon is a desktop environment based on GTK+ 3. The project originally started as a fork of the GNOME Shell, i.e. a mere graphical shell. Cinnamon was initially developed by (and for) the Linux distribution Linux Mint.

Because the Cinnamon desktop environment intends to implement a different graphical user interface (GUI) than GNOME desktop environment, many of the GNOME Core Applications were forked, so that their GUIs can be rewritten appropriately.