every day for real programming with JS: – jQuery: CSS-style DOM selector, animations, event binding, HTTP requests – Sometimes, ExtJS: Observable, ISO8601 DateTime, OO, XTemplate, Store, DomHelper, JSON, Forms, TaskRunner, and a slew of extensible UI components – Underscore.js: functional primitives – DateJS: extended date parsing and manipulation – BlackbirdJS: cross-browser client-side logging – Bootstrap (new!): standard UI components for HTML5