Linux (Ubuntu): If you want to tweak Ubuntu’s Unity interface more to your liking, the Unity Tweak Tool is for you. It gives you everything you need to make your desktop truly yours.
Ubuntu has a lot of tweaking tools, but Unity Tweak Tool — formerly known as Mechanig — brings more Unity-focused tweaks to the table in a very easy-to-use interface. Its set up almost exactly like Ubuntu’s main System Settings windows, but with settings that aren’t as easy to find, such as customising hot corners, workspaces, scrolling tweaks, and theming your fonts and icons.