Crossfilter supports extremely fast (<30ms) interaction with coordinated views, even with datasets containing a million or more records; we built it to power analytics for Square Register, allowing merchants to slice and dice their payment history fluidly. Nvd3. Getting started with Knockout.js. One of Knockout's guiding principles is to stick to its strengths and provide extensibility points for the areas outside of its core competencies.
Kig/JSARToolKit. SPIF - Streaming Progressive Image Format. MultiRes is an image format that makes images look good on all screen resolutions, from mobile displays to Retina displays.
Is that you get to see and play with a lot of little toys before the rest of the world does. YUI was one such tool. I started playing with YUI while it was still in version 1, and its API was much different from what it looks like now. Among the toys I'd made was a bookmarklet to add drag and drop to any website. Create a new Fiddle - jsFiddle.