enquire.js : A lightweight, pure JavaScript library for responding to CSS media queries.
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...
voxel.css : The goal of this project is to provide a lightweight 3D CSS library with very simple implementation.
Leaflet : A Modern, Lightweight Open-Source JavaScript Library for Interactive Maps
Band.js : An interface for the Web Audio API that supports rhythms, multiple instruments, repeating sections, and complex time signatures.
The Closure Compiler, Library, Templates, and Stylesheets help developers create powerful and efficient JavaScript.