Product Hunt Reviews Widget - Embed and encourage PH reviews into your product
Testimonial.to - Collect video testimonials in the simplest way
PaidReview - Get paid for reviewing products
Trust - Trust lets you easily create online surveys, collect customer video testimonials and reviews, then display them with beautiful widgets on your business websites.
Review Scraper API - Reviews from 50+ sites in JSON
Endorsal - Fully automated collection & display of testimonials. Increase conversions with beautiful, simple social proof.