Web-based browse/search frontend for Amazon S3?

Is anybody aware of any self-hosted web-frontends for Amazon S3 (or similar storage services)?<p>I'm looking for something similar to Dropbox's web interface, but backing onto your own Amazon S3 store.<p>Basically, the ability to browse files through a web interface, and search them. I suppose you'd need to deploy this onto your own EC2 instance or other VPS?<p>Support for orchestrating backups, or Amazon Glacier would also be a plus.