Pluglets reside in a pluglet project. The pluglet can be tested in the same instance of the workbench just like any other Java application. Pluglet authors can use the Java development environment, and they have access to the application programming interfaces (APIs) of the workbench plugins to extend and implement the existing pluglets.
You can explore and extend the existing sample pluglets that are included with the product to learn more about how pluglets interact with the workbench.