http://esearch.com/join/ -register for Esearch Research Panel for a chance to be selected for various product tests. They’ll contact you when they have new tests available.
–Update– this program is still available. I usually get approved for a few product tests from them every year.

https://deliveryservicefeesettlement.com/Eligibility -you qualify if you purchased a panda express delivery order between July 17, 2020, and February 16, 2022 where a Service Fee was charged in connection with that delivery order. No proof

https://www.sparklingice.com/rewards/claim – if you have a Sparkling Ice Rewards account, check your account and click the rewards tab. Then look for the free bottle coupon box. If you have enough punches you might be able to get a free drink coupon. If you dont, participate in some of the Activities so you can get a freebie from them in the future(they have new ones at the beginning of each month).

https://garliqueinsiders.com/p/14339-garlique-a-powerful-natural-ally-for-your-heart-health/s/2880388 -fill out the form for a chance to get a Free Garlique Product. They may provide you with a gift card and ask you to purchase it on Walmart.com.

https://ecostronginsiders.com/p/15458-ecostrong-apply-now-for-a-free-sample -fill out the form for a chance to try EcoStrong Organic Orange Stain & Odor Eliminator for free. They may provide you with an Amazon gift card for you to purchase and review the item.

https://halopetsinsiders.com/p/15427-halopets-the-world-s-best-food-for-the-world-s-best-kids/s/2852592-click apply now and fill out the form for a chance to try Halo Freeze-Dried Cat Treats for free. They may ask you to review it on Chewy and provide you with a gift card.

https://www.instyletrendsetters.com/ -click register and sign up for the InStyle Trendsetters Program. As a member you will have the chance to participate in Product tests, they’ll contact you when new opportunities are available.

https://www.storypod.com/pages/product-testers -fill out the form for a chance to become a Free Storypod Product Tester.

https://bellearomainsiders.com/p/15509-bellearoma-apply-now-for-a-free-flashscent-usb-aromatherapy-diffuser-bundle -fill out the form for a chance to try a Belle Aroma FlashScent USB Aromatherapy Bundle for free. They may as you to purchase in amazon and provide you with a gift card.