http://www.kashi.com/account/new -Other member benefits include access to exclusive coupons and the opportunity to become a part of the Kashi Taste Tester Panel.

http://www.trupearls.com/go/Pearls/pubSample.aspx?alias=Pearls&tabAlias=pubSample&WT.mc_id=shape.trupearls.com -copy and paste the link

https://secure02.principal.com/forms/corporate/401kchallenge.htm

Link

http://jjmartinclothing.weebly.com/freebie.html -after you sign up they send you an email requesting your address. I cant find out too much information about them, but it might be worth trying. The email takes a few hours to come
-ADDED-its now  dove haircare sample, kinda weird, but who knows