script.aculo.us : script.aculo.us provides you with
easy-to-use, cross-browser user
interface JavaScript libraries to make
your web sites and web applications fly.
polyfill : polyfill makes web development less frustrating by selectively polyfilling just what the browser needs. Use it on your own site, or as a service.
Yjs : Yjs is a CRDT implementation that exposes its internal data structure as shared types. Shared types are common data types like Map or Array with super...
Ender : Ender is a full featured package manager for your browser.
It allows you to search, install, manage, and compile front-end JavaScript packages and the...
JavaScript Templates : For web application developers, the '''JavaScript Templates''' engine from TrimPath is a lightweight APL / GPL open-source component that lets you hav...
Peer-to-peer data in the web browser.
PeerJS completes WebRTC as an API abstraction, connection broker, and binary serialization format