Preact.js - Preact is a fast 3kB alternative to React with the same modern API. Components & Virtual DOM.
SimilarWeb - SimilarWeb.com is a website analysis tool that gives you analytics information for any website.
Inferno - An extremely fast React-like javascript library for building modern user interfaces.
Site Rank Data - View historical rank information of websites via time series charts.
Glimmer - Fast and light-weight UI components for the web
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.