Notches is an open, free, universal platform for reviews. The service is designed foremost to be integrated by developers in their applications via numerous flavors of API. Reviews written in any of the network's sites will be part of the Notches system everywhere. Reviews of any type (products, services, people, media, etc) and rating scales are supported. The core technology adds a layer of features like normalization, aliasing, summarization, personalization and anti-gaming tools. Notches has released two user-facing applications: a social review application built on the Facebook platform and a Twitter-based review tool.
LouderVoice is a web-based platform that enables customers to write reviews and give feedback on businesses and products.
RateItAll is a consumer-review website that incorporates social networking through reviews on products and services.
Trusted Opinion is a social recommendations site for getting suggestions on restaurants, bars and cafes from friends and expert sources.
Yelp Denmark operates an online platform that connects people with local businesses in the Denmark.
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