Some of the free classified sites list where you can post your ad free: Most of them have an option to link to your website to get some traffic and SEO.

A
adlandpro.com Free Classifieds, Advertising And Promotion @ Adlandpro
adpost.com Free Classifieds @ Adpost.com
adquest3d.com AdQuest3D: Classifieds
albertarose.com The Alberta Rose

B
backpage.com Free classifieds - backpage.com
bestadforum.com bestadforum.com
buysell.com...