V12 Data - V12 Data offers rich data sets with verified addresses and emails for personalized marketing campaigns.

BuiltWith - Find out the technology behind websites

Lotame - Make your data actionable, learn about your most valuable customers, improve ROI by targeting the right audience and increase relevance across screens.

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

RingLead - RingLead offers a complete end-to-end suite of products to clean, protect, and enhance company and contact information.

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