Mark Zuckerberg --Cofounder/CEO, Facebook

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Facebook has been quietly busy under its leader and CEO. This year, Facebook acquired a video startup called QuickFire, which could let it take on Siri. Facebook received criticism for Internet.org, the company’s initiative to provide free internet access around the world, despite making changes to address net-neutrality concerns.

At Facebook’s annual F8 developers' conference, David Marcus, who was hired from PayPal to head up messaging products at Facebook, made big announcements regarding the Facebook Messenger app — expansion into e-commerce and mobile payments inside the app. And Zuckerberg has been talking up Internet.org, his plan to bring cheap Internet access to millions of people in developing countries, every chance he gets.