You can see your apps, that you registered with the registration page, by going to:

stackapps.com/apps/oauth

This page is different for every user and you will be forced to log-in to see it.

The only place I have ever found this link is in a sidebar on Stack App's home page:

Related note:

Your profile page has an "apps" tab:

This is not the same thing.

That tab shows apps that you have authorized to access your account. EG:

Note that the first 2 entries are not apps that I developed, and most of my registered apps are not listed in this tab. Only the ones that I have also logged in with via OAuth are shown.