BuiltWith - Find out the technology behind websites
LeadBring - Automate your LinkedIn workflow
Wappalyzer - Wappalyzer is a technology profilers and leads data provider. Create lists of websites and contacts that use certain technologies.
Marketing for Startups - 47 practical tactics to get customers and achieve hockey stick growth.
WhatRuns - Extension that helps you identify technologies used on any website at the click of a button.
Toby for LinkedIn - Save yourself needless clicks and your precious time & See company info without exiting the profile pageSimple as that