BuiltWith - Find out the technology behind websites

Profile Hopper - Chrome Extension to Growth Hack LinkedIn

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.

LinkedIn Organic - How to acquire customers through organic LinkedIn content.