This is something I wrote almost an year ago. It wraps around Instagram's public API and provides access to public posts programmatically in a CORS compliant fashion. This works really well for building instagram image galleries as it does not require registering an app with instagram. It also provides a one-click deploy with heroku which let's the users host a private instance of the API.
As of today no other solution provides such access to instagram.
Nishant Arora