Reviewshake - Reviewshake helps you manage all your review sites from one place, automate new reviews from your customers and track review performance
Product Hunt Reviews Widget - Embed and encourage PH reviews into your product
Review Monitoring - Review monitoring helps restaurants and hotels aggregate their customer reviews
Reviews for iOS - Keep track of your App Store reviews
Reputon - Collect, improve, manage and display Google, Facebook, Trustpilot, Yelp & Amazon reviews on Shopify merchant store, avoid negative reviews. Testimonials and feedback to boost your website SEO.
BuzzFeed Reviews - The best things at 3 price points. A Wirecutter competitor.