jQuery : The Write Less, Do More, JavaScript Library
Autotrack : Automatic and enhanced Google Analytics tracking for common user interactions on the web.
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...
Wave.js : Audio visualizer library for javascript. Create dynamic animations that react to an audio file or audio stream.
PeerJS : Peer-to-peer data in the web browser.
PeerJS completes WebRTC as an API abstraction, connection broker, and binary serialization format
Add Clippy or his friends to any website for instant nostalgia.