When querying for existing applications, the response should contain a link to create new applications beside the existing applications:

<data>
 <applications>
  <application>...</application>
  <application>...</application>
  <link>
        <rel>Create new application</rel>
      ...
  </link>
 </applications>
</data>
For now, this link is in the /domains/<namespace> response, but having it in the /domains/<namespace>/applications response seems more consistent with the way of exposing operations from a given location