ZoomInfo - ZoomInfo is a B2B database providing detailed business information on people and companies.
Wappalyzer - Wappalyzer is a technology profilers and leads data provider. Create lists of websites and contacts that use certain technologies.
Datanyze - The sales prospecting tool powered by technology data
BuiltWith - Find out the technology behind websites
LinkedIn Sales Navigator - Sales tool for LinkedIn users.
WhatRuns - Extension that helps you identify technologies used on any website at the click of a button.