If you want to add an app to your Facebook page and for some reason you can't find View App Profile Page at the left part of the page when you registered it at http://www.facebook.com/developers, you can do it by typing in the addess bar the following:
http://www.facebook.com/dialog/pagetab?app_id=YOUR_APP_ID&next=YOUR_URL
where YOUR_APP_ID and YOUR_URL can be found in your app settings.
You can see here in more detail http://giota-mywebworld.blogspot.com/2011/09/create-custom-page-in-facebook.html, how you can add a custom Tab in your Facebook page, using Facebook Developers.
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