Once you've signed up, you'll have your own dashboard.
The Dashboard is where you manage your apps, your subscriptions, and your profile.
An Example Dashboard
Your dashboard is where you can create a new application, and edit an existing application.
To create a new application, click the 'New Application' button at the top of the screen. You can then scroll through the application templates, preview them to see if they're a fit, and then select your preferred template.
A Selection of Templates
Selecting a template and clicking 'Create' will generate an app for you, and store it in your dashboard.