Wal-mart regularly carries free samples on their website. They are very good about sending the free samples quickly and I have never been disappointed with the samples. I will be posting new ones on this site as I see them so come back and check often for free samples from Wal-mart!
Prilosec Free Sample (you will have to answer 2 questions to see if you qualify)
Zantac Free Sample
Playtex Free Sample (if you click "Get Extra Savings" above where you click to get the free sample on the Playtex site, you can print up to 2 $2.50 off coupon when you buy two boxes of Playtex Gentle Glide tampons)
Nivea Free Sample (scroll down free sample list until you find it!)