Isotope

Pretty impressive jQuery plugin for layouts by David Desandro.

Formtastic

Nice Rails from builder.

Some nice CSS snippets

Custom scrollbars for webkit

Awesome @font-face syntax

Killer JSON viewer

History of the User-Agent string

Another JS HTML5 Chart Engine

Rails 3.1 mountable engines

Really looking forward to this.

HTML5 canvas sprite optimization

Video on jQuery Templates

Quick Left-overs is a weekly series of things that end up in our "FancyBookLearning" Campfire room that we thought were interesting.