What are the best Facebook apps?

What are the chances Facebook builds their own version of GMail, acquires an enterprise app platform like Box or Quip to complete the app suite, and then dives into the enterprise with Facebook Apps?

• Assumptions: Youth aren't using email although email powers so much of corporate, asynchronous communication and project-planning. Facebook has already invented their own email product which masquerades as Facebook messaging. It has attachments, read receipts, and works across all platforms and devices. Facebook messaging primary app used by the youth. Facebook potentially building their own Gmail product using their learnings from Facebook messaging. Enterprise likely to be a future revenue frontier for Facebook. It's logical email/messaging could be their starting point. Bret Taylor -- former Facebook CTO and creator of Friendfeed -- just invented Quip, a v1 Microsoft Office for the mobile and tablet generation. Aaron Levie and Box are getting into the productivity apps suite business now too. Has extensive experience in enterprise and cloud technology. Both are exceptional product leaders and visionaries, which Facebook wisely places a premium on. Google Apps monthly pricing model = pure genius (I'm a happy customer). Google Apps itself is genius. Acquiring one/both would give them app layer needed to compete in paid enterprise suite level inside 1 year. Question prompted by reading this, discussing w/FB engineer: http://www.nytimes.com/2013/09/29/fashion/technology-and-the-college-generation.html?pagewanted=1&emc=eta1

• Answer:

  Zero.