Aaron Patzer, 29
To become the man he is today, Aaron Patzer gave up seven months of his golden 20s to lock himself in a room and write code. At the tender age of 24—frustrated with the multistep process of the popular financial-planning program Quicken—he decided budgeting didn’t have to be such a burden. Three years later, Patzer launched his solution: Mint.com, a website that keeps track of financial transactions, no manual input required.
Millions of users caught on—as did Mint’s undisputedly bested competitor, Intuit (which owns Quicken). All’s well that ends well: Last year, Intuit bought Mint for $170 million.