BuiltWith - Find out the technology behind websites

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.

Spokk - Get your creations or ideas for blogs, designs, art, music, photos, YouTube videos or anything...

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

FaqFox - Find the questions your target audience is talking about