jquip : Smaller, Lighter, Faster, more modular jQuery - include only the parts you want! Don't use it, Don't include it.
Headroom.js : Headroom.js is a lightweight, high-performance JS widget (with no dependencies!) that allows you to react to the user's scroll.
JavaScript Templates : For web application developers, the '''JavaScript Templates''' engine from TrimPath is a lightweight APL / GPL open-source component that lets you hav...
Bliss.js : Want to use Vanilla JS but find native APIs a bit unwieldy? Bliss is for you
stream.js : stream.js is a tiny stand-alone Javascript library that unlocks a new data structure for you: streams.
Sammy is a tiny javascript framework built on top of jQuery, It's RESTful Evented Javascript.