Call Me Private vs CmisSync

Why give out your phone number to anyone when you can give out your virtual number to everyone!

Whether you wish to appear more like a professional or claim back your privacy, Call Me Private offers virtual number as a service that allows you to purchase unlimited virtual numbers that forward calls to your real phone numbers. Features include forwarding, recording, conferencing, messaging, and voicemail.

Synchronize documents between your computer and your enterprise file server (Alfresco, SharePoint, Documentum, any CMIS-compliant server)

It is like Dropbox for Enterprise Content Management!
For file sharing/synchronization, don't get a new server or rely on the cloud: just use your existing document management server.
Free and open source.