AppShopper - Mac Apps, Mac App Store, iPad, iPhone and iPod touch app store listings, news, and price drops
Review Lancer - Reviewlancer also provide a platform for Developers or Marketers to free exchange app reviews and ratings. Now market your app for zero budget.
AppAgg - Application Aggregator
UserTrue - Free peer to peer app reviews. Give a review, get a review for free.
AlternativeTo - AlternativeTo lets you find apps and software for Windows, Mac, Linux, iPhone, iPad, Android, Android Tablets, Web Apps, Online, Windows Tablets and more by recommending alternatives to apps you already know.
Reviewsmotion - In Reviews Motion you will be able to get reviews for your iOS and Android apps in a fast and simple way.Increase the downloads and the earning of your apps