Matt Mullenweg; 19 years old Wordpress.com Founder

Matt Mullenweg is another software developer who found success at a very early age. When Matt was 19, he announced that he would be starting an open source initiative for better blogging software and started Wordpress. Since then the software programmer started Automattic, which has two flagship products Akismet, a trap for site comment spam, and Wordpress.com, the hosted version of the open source Wordpress software. Since founding Automattic, the company has raised over $30 million dollars and owns some of the most popular software on the Web.

(inspired by americanexpress)