Wappalyzer - Wappalyzer is a technology profilers and leads data provider. Create lists of websites and contacts that use certain technologies.
Lead Peep - Thousands of b2b leads in the palm of your hands, instantly.
BuiltWith - Find out the technology behind websites
YesData - YesData offers data cleansing and enrichment solutions.
What CMS - WhatCMS.org looks at a variety of factors within a webpage to determine what CMS a website is using.
ActivePrime - ActivePrime platforms provide data enrichment solutions for CRM systems.