Elementary Tweaks 0.2 recently released, is a 3rd party application that allows a you to modify many components on your desktop. A small team of 3rd party developers recognized that many users wanted this capability and set up a community repository to develop applications, tools and window decorations specifically targeted at the elementary project. Some of the capability of elementary tweaks are listed below:
Appearance: Allows you to change your windows user interface, and your icon theme.
Font: Personalize your system wide fonts for a consistent look and feel. System wide fonts impact your Window titles, menus, notifications etc however may not effect some 3rd software applications.
Animation: Control the open, close, minimize and maximize motion speed and effects of your windows
Shadows: Tweak the depth of shadows on your menus and open windows
Plank: Change the icon size, theme, screen position of the plank dock. It also has multiple options for hiding or showing the dock including intelligent-hide mode.
Slingshot: select the number of rows and columns to display your application launchers.