It provides information about IP address, domains's register or expires date, Alexa, SSL Certificate, Page Load Time, Social Engaged, Safty test, Moz Rank, Hosted server detail, Technology used, Whois detail, HTTP Headers and DNS Records. Moreover, there are tremendous productivity tools for the developers such as SEO check, Sitemap Generator, Image to Base64, Hash Generator, JSON Formatter, CSV to HTML, JSON to XML and many more.
CubDomain
It's a free tool which provides the data about the website's stats and tools for developers.