Ask HN: Which javascript libraries/frameworks/tools you use?

I'm currently using dojo/dijit/dojox (for good or bad, work requirement). Kinda the same purpose as jQuery/jQuery UI, but I believe that it does not focus on bringing in HTML 5/CSS 3 functionality quite as much.

I have always used jQuery adn jQueryUI for all my javascripting work. I find it easy to understand, code and debug. There are loads of javascript libraries out there but i find jQuery the best to work with.

I currently use JQuery, JQuery Topbar, JQuery Validation, JqPlot, CSS3, HTML5

jQuery mostly but not I have been playing with backbone.js and underscore.js. I Would love some helpful tutorials to help pick them up faster.

underscore sammy (with jquery-urlinternal-plugin) uglifyjs

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