hubsell - Sales automation for modern sales teams
Wappalyzer - Wappalyzer is a technology profilers and leads data provider. Create lists of websites and contacts that use certain technologies.
Elucify - A completely free software tool that uses crowdsourced data to find business email addresses
BuiltWith - Find out the technology behind websites
VisitorTrack - Cloud Based Affordable Biometric Visitor Management System To Eliminate Maintenance & Expense of ID Cards & Printers, Replace Paper Logs & Sign-In Sheets.
What CMS - WhatCMS.org looks at a variety of factors within a webpage to determine what CMS a website is using.