Seafile is an open-source cloud-based file storage system similar to Dropbox & Box. The difference is that Seafile can be deployed on a client’s own system. This provides a greater safety and security factor as the passwords are only interchanged between the client who setup the system, and his / her own users rather than a corporate cloud hosting company.
http://www.howtoforge.com/how-to-use-ispconfig-and-seafile-without-manual-modifications
