| Class | Description |
| Application |
This class represents an application. |
| Dialogs |
This class contains a number of utility functions to display various dialog boxes. |
| DockItem |
The dock item is the main Appetizer object. |
| Global |
The functions and objects of this special class are accessible from anywhere in Lua. |
| Menu |
This class can be used to display a context menus via the popupMenu() function of some objects. |
| MenuItem |
Menu items are used in conjunction with the Menu class to build menus. |
| OptionButton |
Option buttons are displayed on the option panel. |
| OptionPanel |
The class represents the small panel that shows up when the user clicks on the arrow button. |
| Plugin |
Represents a plugin object. |
| Preferences |
Preferences provide a persitent data storage for plugins. |
| System |
This class provides some system utility functions. |