Matt Mullenweg is the founding developer of the popular open-source blogging software WordPress, which powers nearly 20 percent of the Web.

It’s hard to find a power list that Mullenweg isn’t on. He’s on PC World’s Top 50 People on the Web, Inc.com’s 30 under 30, Business Week’s 25 Most Influential People on the Web, and Vanity Fair’s Next Establishment.