MetaSurvey - MetaSurvey provides light and high engagement surveys for e-commerce.
Wappalyzer - Wappalyzer is a technology profilers and leads data provider. Create lists of websites and contacts that use certain technologies.
BuiltWith Toolbar - Reveals the tech underneath a website. Browser extension.
BuiltWith - Find out the technology behind websites
DataBasic - Easy-to-use web tools for beginners
WhatRuns - Extension that helps you identify technologies used on any website at the click of a button.