Matt Villano is a freelance writer and editor in Healdsburg, Calif. He is a regular contributor to Entrepreneur, and has covered startups and entrepreneurship for The New York Times, TIME and CIO. He also covers a variety of other topics, including travel, parenting, education and -- seriously -- gambling. He can be found on his personal website, Whalehead.com.
Former NFL assistant coach Charles Coiner launched FirstDown PlayBook DropBack for middle-school, high-school and college teams. The app has a database of more than 5,000 plays--many used in real-game situations.