HelpNDoc - What is HelpNDoc ? Easy to use yet powerful help authoring environment which can generate various documentation formats from a single source.

BuiltWith - Find out the technology behind websites

Dr.Explain - Dr.Explain software is a help file authoring tool.

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

MadCap Flare - Documentation for Any Audience, Language or Format

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