Project Farm (youtube.com/projectfarm) - Great independent reviews of tools
Mcmaster.com - Higher quality products than you can get at your local hardware store and excellent customer service. When I've gotten the rare incorrect or damaged item, 1 email gets me a refund and a replacement overnighted.
Wirecutter - Not as go-to as it used to be in my mind, but great for background
ConsumerReports - Check if you can get free access through your local library website
ReviewMeta (reviewmeta.com) - Analyzes Amazon reviews for authenticity
All of these have problems but they are still good resources. Any others I'm missing?