Awesome Standalones 
A curated list of awesome framework-agnostic standalone web components
Contents
Element Extensions
Web Components that extend or add to an existing semantic element.
<time> Elements
Github has a bundle of elements that extend the native <time> element.
Custom Elements
Frequently-solved problems in web component form.
<clipboard-copy><input-knob><lite-youtube><model-viewer><pinch-zoom><range-slider><tab-container><task-lists><two-up><dark-mode-toggle><katex-display>and<katex-inline><html-include>
Novelty Elements
Contribute
Contributions welcome! Read the contribution guidelines first.
Thanks @simevidas for prompting the idea.
License
To the extent possible under law, Dave Rupert has waived all copyright and related or neighboring rights to this work.