Right now Walmart has available free samples of Playtex Sport Tampons, Carefree & Stayfree Liners, some of their Bodycology scented lotion & body sprays and Scope Outlast Mouthwash. Just go here to their free samples page.
Its true that often you don't seem to get much with free samples however, the ones that I request & receive from Walmart's site have always been accompanied by pretty decent valued coupons for the product. So definitely worth requesting if its a product you use or have been wanting to try!
Also go here on their website. They currently have a free calendar you can request that has $20 worth of Nestle Coupons! Products like Stouffers, Friskies Cat Food, Juicy Juice and Coffee Mate! Don't miss out on these great free coupons!