Linktree - Connect your audience to all of your content with just one link.
Wappalyzer - Wappalyzer is a technology profilers and leads data provider. Create lists of websites and contacts that use certain technologies.
Linkfire - Linkfire is a smart links tool for music marketing.
BuiltWith - Find out the technology behind websites
Amplify.link - Powering artists and creators worldwide, providing the tools and knowledge to help artists and creators market themselves more effectively, reach more fans, and monetize their audiences.
What CMS - WhatCMS.org looks at a variety of factors within a webpage to determine what CMS a website is using.