Though I do check out a lot of freebie sites each week, my favorite by far is BestFreeStuffOnline.com. I really like the way this site is set up as it's easy to find just about anything and everything you want. Choose from free stuff for moms, dads, kids, pets, and much more.
Now I won't go and say that everything you find on this site is worth your time, because it's not. There's always a little chafe left over with the wheat. But there are a lot of free coupons and samples that can be found throughout the site.
Sign up for the free weekly newsletter and keep up with all the latest freebies added to the site. You never know when they'll add that little something you've been looking for longer than you can remember.