Product Reviews - Concise and unbiased software product reviews
Reviews for iOS - Keep track of your App Store reviews
Search Best Sellers - This is the only free way to search Amazon's Best Sellers.
Product Hunt Reviews Widget - Embed and encourage PH reviews into your product
BuzzFeed Reviews - The best things at 3 price points. A Wirecutter competitor.
TheReviewIndex - An Amazon review summarizer using neural networks