Client area script

Hey guys,

Does anyone know of any good client area scripts? Just trying to explore some options before we go ahead and develop our own.

It mainly just needs to feature separate areas for each client where we can share any files we have with them and they can also upload files for us. We'd also like to be able to see whether user's have downloaded the files and be able to leave some sort of feedback. Also we'd need to be able to customise the look of the client area to fit our branding.

Any suggestions would be grand!

Cheers

Jack