Does anyone know of an alternative to Dropbox PHP. It's a file transfer web UI for authenticated users and groups. I'm looking for an alternative to FTP since lots of my co-workers (esp. managers and VIPs) and outside contacts are skittish around FTP.

Dropbox PHP Seems to be what I'm looking for but I'm concerned it's version 0.0.8 beta and the latest update eight months ago.

I see there's similar online services but I'd prefer to host it with me. I hear Drupal has something similar using the IMCE module but I thought I'd ask here for other alternatives.

PS...apologies if this is the wrong area for this post.