What are the best sites to put free ad ?

Advertise anywhere and everywhere at all times. It will pay off....

Craigslist is the best site for free ads.

If you're looking for website promotion, you might want to look at submitting your site to search engines and directories, both of which are available in abundance online.

But for free ads: Craigslist wins.

ForeclosureFish

http://www.foreclosurefish.com/

You can try signing up at a newly launched forum that allows you to place an ad. Whenever you post, comment or even view another post your ad is displayed and if you refer people it is displayed whenever they post, comment etc. Check it out its good.

Craigslist.org

Craigslist will get you ranking in local searches. There are many other places to look that are free (I'm on the wrong computer currently) but potential customers rarely look at them.

yes sure u can amake contact with different companies and tell them that yoiu are having this web page and it wud be helpfull to do net marketing.also u can make a cointact with google add.

Madvlad safelist and yahoo groups.

craigslist.org