From the Account, Organisation and Applications tab. You will see your organisations applications on the left and available applications on the right.
You can import the available applications by clicking the download icon to import the applications in to your system.
On the left, you can click the plus icon to add a new application. Where you will need to provide a Title, Under Development tick box, Description, whether it's Public access, a contact email address for support and Full Details web URL.
Save the form to add the application to the list.