Site Rank Data - View historical rank information of websites via time series charts.
Statista - The Statistics Portal for Market Data, Market Research and Market Studies
SimilarWeb - SimilarWeb.com is a website analysis tool that gives you analytics information for any website.
Displayr - Displayr is a data science, visualization, and reporting platform for everyone.
Quantcast - Quantcast Corporation is a digital marketing company that provides free audience demographics measurement and delivers real-time advertising.
Statwing - Simply upload your spreadsheet or dataset, then select the relationships you want to explore. Statwing was built by and for analysts, so you can clean data, explore relationships, and create charts in minutes instead of hours.