It is an Autodesk property and Autodesk tools are often being discussed, but the company plays its ownership role very unobtrusively so users will talk candidly with each other while company people listen.

FORBES: Autodesk's Brilliant Consumer Strategy

Privacy and data security is a shared responsibility, after all, and users have a role to play.

CNN: Bush email hacking a wake up call

Most allow for users to take an active role in helping the app decide what kinds of things they want to read.

WSJ: The Digital Solution: In Your Hands, Just What You Want to Read