SalesOptimize - Selling to online retailers? Revolutionary sales lead generation search engine driven by deep web analytics
Wappalyzer - Wappalyzer is a technology profilers and leads data provider. Create lists of websites and contacts that use certain technologies.
Sparkroom - Sparkroom streamlines school marketing and operations.
BuiltWith - Find out the technology behind websites
WhatRuns - Extension that helps you identify technologies used on any website at the click of a button.
Elucify - A completely free software tool that uses crowdsourced data to find business email addresses