Product Reviews - Concise and unbiased software product reviews
Product Hunt Reviews Widget - Embed and encourage PH reviews into your product
ReviewBay - Aggregates the best reviews of Amazon products.
ReviewFlowz - Never miss a review again All your reviews, straight to your favourite slack channel.
BuzzFeed Reviews - The best things at 3 price points. A Wirecutter competitor.
Review Scraper API - Reviews from 50+ sites in JSON