Three of the more popular online classified sites are Craigslist, eBay Classifieds and Oodle. Craigslist is the most well-known of the three, having been launched in 1995.
Largely free to use, Craigslist includes categories similar to those seen in newspaper classifieds sections. It is a popular hub for those seeking apartments to rent, jobs or to buy cars and trucks.
Previously called Kijiji, eBay Classifieds offer nearly every category Craigslist does, with the exception of personal ads. Its association with eBay gives the service a high profile and allows it to compete with Craigslist.
Oodle offers its own online classifieds as well as aggregates ad posts from ForRent.com and eBay Classifieds. It provides the usual categories and includes personals. It also allows users to narrow their searches with as many filters as they like.