BuiltWith - Find out the technology behind websites

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

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

HelpSmith - HelpSmith is a help authoring tool to create CHM HTML help files, manuals, and PDF documents.

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

Adobe RoboHelp - Adobe RoboHelp empowers organizations to deliver engaging help and policy content across mobile devices, formats, and platforms.