BuiltWith - Find out the technology behind websites

UserGems - UserGems is an AI-powered prospecting and business intelligence solution that makes it simple for anyone to find and contact potential customers.

Wappalyzer - Wappalyzer is a technology profilers and leads data provider. Create lists of websites and contacts that use certain technologies.

Zint - Zint is a top-of-the-line sales intelligence platform that makes it easier for businesses to find and track their most important prospects.

WhatRuns - Extension that helps you identify technologies used on any website at the click of a button.

CartInsight - CartInsight curates millions of online stores & delivers a comprehensive database of ecommerce...