When Melinda Gates met Bill Gates, he was just an everyday nerd with a dream. By the time they married in 1994, the Windows inventor was on his way to a multi-billion-dollar fortune. He'd be the richest man in the world if he didn't give so much of his wealth away to charity.
This is another love story that started at work - during the early days of Microsoft, he employed her as head of information products. They still work together now as the co-chairs of their charity foundation.