Where can one advertise a job for free on the Internet?

There are many Internet sites where prospective employers can advertise for free, including Monster.com and Craigslist.org. While Monster.com is an official job posting site, Craigslist advertises other things as well.

Most sites will need the user to create an account prior to posting a job advertisement, but an account is usually free. The prospective employer may not have full access to all features of the site, however. In addition to Monster, other official job sites that offer free services include JobSpider, FinaAJobAlready and Jobvertise. It is also possible to advertise job postings within groups in the social media giant LinkedIn, which is primarily used for employment connections.