In a world of graphical user interfaces, WordPress fits right in with its system of widgets that allow users to add content and information to their Web sites without having to touch a single line of code in their WordPress templates. Book VI, Chapter 1 discusses the use of widgets, in-depth, whereas Book VI, Chapter 3 discusses how to add widget areas to your WordPress theme template files. Plugin developers can create widgets that work with their plugin so you can add the plugin information on your site anywhere you have a widget (sidebar) area.
Depending on your particular theme, adding a new widget to your WordPress site removes the default widgets your theme has set up for you.
Each plugin's widgets have greatly differing options for their display and functionality. The following list examines several WordPress plugins that create their own widgets for you to use: