Craig Newmark is the founder of Craig's List (spelled craigslist), a site that provides free classified ads for people in more than 200 cities around the world. Started in 1995, it is now one of the most visited sites on the internet.

Craigslist includes notices for public events and only charges a fee for job and real estate listings in some large cities. The organization and Craig in particular are notable for both their groundbreaking work in making Web 2.0 usable for everyday purposes and their support of non profit organizations.