SimilarWeb - SimilarWeb.com is a website analysis tool that gives you analytics information for any website.
Planet Explorer - Interactive global satellite images
Site Rank Data - View historical rank information of websites via time series charts.
Pictogon - The fastest and easiest way to create interactive images
Google Analytics - Improve your website to increase conversions, improve the user experience, and make more money using Google Analytics. Measure, understand and quantify engagement on your site with customized and in-depth reports.
Tape It - App for songwriting & audio recording.