Top Similar Sites - Top Similar Sites helps you find similar, alternative or related sites to any website instantly.
SimilarSites - Easily find more sites like those you like.
moreofit.com - Moreofit is the first (and best) website similarity search engine.
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.
SaaSHub - Promote the SaaS services you use, develop and love. Find cloud software that will help you grow your business.
Google Similar Pages - Google Similar Pages is an extension by the Google for its Google Chrome web browser users.