When I log to my S3 console I am unable to download multiple selected files (the WebUI allows downloads only when one file is selected):
https://console
Also if you are running Windows(tm), WinSCP now allows drag and drop of a selection of multiple files. Including sub-folders.
Many enterprise workstations will have WinSCP installed for editing files on servers by means of SSH.
I am not affiliated, I simply think this was really worth doing.