To get started using Zembly, no account is needed, though a sign up option is available. Choose the "Try it Now" option. The following screen will present these choices: starter widget, map widget, and gift application. Click on the one you want to make to get started.
Now, you'll be able to watch a video. The first step is to create an application on Facebook. It will provide an API to you, which you'll need to use to develop the application. Starter code is available to help you. If you want other people to help you develop the application, you can send invitations to other contributors.
Sample apps are available to show users exactly what can be done with Zembly. Some of these apps allow for cloning while others do not.