Before I get started, I'd like to suggest an alternate email address just for Freebies. Many of the companies will add you to mailing lists. Another option is to use the email masking from Blur (you can opt to have them forward messages to your real inbox [for example, if you want mailings from a Freebie site] or just go to the temporary Blur inbox). Very useful. Okay, so onto the Freebie Sites:
All of these post assorted Freebies, usually multiple times per day. Most have the option to sign up for a daily email of their newest Freebies....
Shop 4 Freebies
The Freebie Source
I Crave Freebies
Totally Free Stuff
Scam Free Samples
Frugal Tips & Freebies
This next list is pretty similar to the first. But instead of being websites with Freebies, they're Facebook pages. The page owners, visitors, etc share links for Freebies....
Hunt 4 Freebies
Free Samples 2 Fill Up Your Mailbox
Share Your Freebies
Free Stuff & Free Samples from MyCoolFreebies.com
Along similar lines, there is one group on Facebook that I'm a member of. Although there are others, this is the only one I've seen that has a lot of Freebies posted daily. The group does have a few rules, so please be respectful if you look it up and join....Freebies and Coupons By Mail Only.
Sample Store is one I've checked out, but had some trouble with. It SAYS it'll ship anywhere, gives you plenty of options. But when I entered a (five digit) US zip code, it asked for a sixth digit. Also, it wants your cell phone number, but when I tested to see if it takes a US number (NOT my cell, as I was only checking it out), it said I needed to enter a valid number from Singapore. If you can get this site to work, it does have some interesting-looking Freebies.
Finally, I'll give links to Target's sample page and Walmart Samples and Savings page. I would also include K-Mart, but the link seems to have moved/disappeared a while back. Every attempt I've made to find it has been a failure. I'm sorry.
One last thing I'd like to mention. Unlike with the Product Testing sites, these are almost NEVER full-sized products. You'll get enough perfume/cologne for one application, enough food for one small portion, one dose of medicine/supplement, etc. You can try out a different shampoo/conditioner every day (though I find the sample packs are enough for 2-3 washings, and I have very long hair), test out different vitamins or allergy medicines, try a new scent without committing to a whole bottle. As long as you're aware of that and expect just a trial of the product, you'll be happy.
Also, there ARE other Freebie sites (new ones pop up all the time). So feel free to search around (and don't hesitate to comment YOUR favourite Freebie site(s)! Until next time.....