BuiltWith - Find out the technology behind websites
Searchable GDPR - Easily search in the official GDPR text thanks to Algolia
Wappalyzer - Wappalyzer is a technology profilers and leads data provider. Create lists of websites and contacts that use certain technologies.
GDPR Form - The easiest way to handle data subject access requests
What CMS - WhatCMS.org looks at a variety of factors within a webpage to determine what CMS a website is using.
iubenda for GDPR - Finally an easy, all-in-one solution to comply with the GDPR