App Review Times - Find out the average app review times for iOS & Mac apps
Reviews for iOS - Keep track of your App Store reviews
App Reviews Dashboard by Appfigures - Monitor, analyze, and reply to app reviews in one place
Product Reviews - Concise and unbiased software product reviews
PitchWall - Browse new startups, and submit your mobile app/games startup's beta page here.
Review Scraper API - Reviews from 50+ sites in JSON