Ubuntu Tweak

Ubuntu Tweak is one other tweak tool for Ubuntu that can be used to change settings of theme, fonts and desktop. Such tools have become essential since Unity no longer provides any settings to change them. A nice bonus in Ubuntu Tweak is the Janitor option that allows you to remove cruft of packages and such items from your system easily.

Ubuntu Tweak can be installed easily by using its official PPA:

$ sudo add-apt-repository ppa:tualatrix/ppa
$ sudo apt-get update
$ sudo apt-get install ubuntu-tweak

Tried with: Ubuntu Tweak 0.8.8 and Ubuntu 14.04