InsideView - InsideView aggregates and curates all the company and contact data, news and social insights, and professional connections you need to do business better.
Wappalyzer - Wappalyzer is a technology profilers and leads data provider. Create lists of websites and contacts that use certain technologies.
China Company Check - Check and verify the Chinese company
BuiltWith - Find out the technology behind websites
Clearbit - Clearbit provides Business Intelligence APIs
WhatRuns - Extension that helps you identify technologies used on any website at the click of a button.