wappalyzer

https://www.wappalyzer.com/

Chrome Browser Extension https://chromewebstore.google.com/detail/wappalyzer-technology-pro/gppongmhjkpfnbhagpmjfkannfbllamg

Firefox Browser Extension https://addons.mozilla.org/en-US/firefox/addon/wappalyzer/

Install Wappalyzer CLI:

go install -v github.com/webklex/wappalyzer@main