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...