Top Similar Sites - Top Similar Sites helps you find similar, alternative or related sites to any website instantly.
Site Rank Data - View historical rank information of websites via time series charts.
SimilarSites - Easily find more sites like those you like.
HypeStat - HypeStat is free statistics and analytics service, where you can find information about every website.
Sites Like - Siteslike opened it's doors to the public on the 4th of december in 2008, since that time...
Q-Stats - Get free marketing insights for every question on Quora.