List of free components stuff for developerππ½
If you're looking for all programming tools around components (not just free). Check this page List of components Programming Tools

Block Protocol
A standardized way to create blocks whose contents are mapped to schemas, which are both human and machine-readable.
Tag: frontend, components

Total.js Platform
Total.js Platform is a collection of server-side & client-side JavaScript/Node.js libraries, Web Components, icons, practices, and complete apps written in pure JavaScript, mostly without dependencies.
Tag: devtools, cms, text-editor, visual-programming, components