Amalgam is a REALbasic plugin and defines a blending of pictures, windows and custom widgets allowing the creation of a novel GUI for the Mac and the Windows platforms. For example, you can create a mac user interface on windows, or a windows interface on the mac.

The Drawable class, as defined in the plugin, is compatible with a variety of usages, including the generation of alpha-aware pictures on your desktop that are not confined to a particular window. The Drawbar class can be used as a container for widgets or drawables, in addition to providing additional custom drawing.