Web Components topic
Developers can create custom, reusable, encapsulated HTML tags for the web using Web Components. Components use the Custom Element standard, frequently in combination with the Shadow DOM, HTML Templates, and ES Modules.
jQWidgets
Angular, Vue, React, Web Components, Blazor, Javascript, jQuery and ASP .NET Framework,
github-card
Github profile web component that actually looks good
lit-redux-router
Declarative way of routing for lit-html powered by pwa-helpers, redux and lit-element
custom-elements
All about HTML Custom Elements
CleverStyle-Framework
CleverStyle Framework is simple, scalable, fast and secure full-stack PHP framework
aybolit
Lightweight web components library built with LitElement.
jsx-native-events
A JSX schema for adding support for native events (including CustomEvent)
offline-first-app
OfflineFirst demo app with some WebComponents and PouchDB
are-we-componentized-yet
Are We Componentized Yet (retired)
l2t-paper-slider
Polymer element for displaying slides in a carousel