Pingboard - Pingboard is the employee experience suite for growing companies that put their people first.

BuiltWith - Find out the technology behind websites

LucidChart - LucidChart is the missing link in online productivity suites. LucidChart allows users to create, collaborate on, and publish attractive flowcharts and other diagrams from a web browser.

Wappalyzer - Wappalyzer is a technology profilers and leads data provider. Create lists of websites and contacts that use certain technologies.

Visio - Simplify and communicate complex information using data-linked diagrams.

What CMS - WhatCMS.org looks at a variety of factors within a webpage to determine what CMS a website is using.