BuiltWith - Find out the technology behind websites

Albacross - The world's first free B2B Lead Generation Network. Albacross help companies master their B2B digital marketing with Lead Generation and targeted marketing

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

LeadCrunch - Discover New Customers. Now.

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

eMiner.app - The eMiner is a marketing automation tool that automatically mines public emails on the internet to generate segmented lists of potential customers.