BuiltWith - Find out the technology behind websites
Roboflow Annotate - Annotate images with ease. Export to any format.
Wappalyzer - Wappalyzer is a technology profilers and leads data provider. Create lists of websites and contacts that use certain technologies.
Drift - A messaging app that helps you grow your business.
What CMS - WhatCMS.org looks at a variety of factors within a webpage to determine what CMS a website is using.
Good Annotations - A online annotation tool that is perfect for providing feedback to your team.