Craigs List
Craig Newmark is the founder of Craigslist.org. It have started in 1995 and initially covering only the San Francisco Bay Area but then it became popular and now covers about 450 different cities around the world. The concept is simple and it is user-friendly. Its simplicity is what lured people into it. You can check for ads under the right categories to make it easier or you can just easily search using keywords through their search engine. Craigslist gets over 700,000 new jobs every month and gets millions of visits which is why in order to get a huge viewers, advertising in craigslist is a must.