Database & SQL
Free ads sites
Google has a free service for listing products and services. Ads only last for 30 days though.
This is one of the best free ads sites. Google seems to love it.
Not a fan of the newspaper, but it does allow free online ads
Free business directory
This is a big site from USA. It looks really bad, but think its still quite popular.
More famous for its printed directory, but it does hae a web site.