DragonDisk is a file manager for the Amazon S3 Service. DragonDisk has lots of useful features and an intuitive graphical user interface.
Features include multiple windows; copy / move between Amazon S3 accounts; a fast multi-threaded HTTP/HTTPS engine; folders synchronization; drag and drop; rename files and folders; filename filters; BiTorrent, time limited, and signed URLs; files integrity control; a metadata editor; ACL inheritance; detailed operations logs; external buckets; CNAMEs; Reduced Redundancy Storage; and support for versioning.