If you’re looking to host your own “Basecamp” customer management app, WP Customer Area might suit your needs. Check out their demos to get a feel for what it can do.

WP Customer Area is a modular all-in-one solution to manage private content with WordPress. Files, pages, conversations, tasks, etc.: sharing private content with one or multiple users is the main feature provided by our plugin. Give it a try!

via WP Customer Area