Use the Chat Rooms plugin to have chat rooms added to your site, powered by Firebase and AngularJS.
AngularJS for WordPress allows you to easily leverage the power of AngularJS and put it into your theme.
Client side validation of your WordPress Comment form
WordPress Plugin to columnize content automatically
SiteBrains blocks spam posts using a completely configurable set of rules. Both interactively as the user types and on our servers upon submission.
This plugin adds client-side validation to the WordPress comment form, using the jQuery validation plugin.
qTwit is a WordPress widget that loads Tweets (from Twitter) on the client-side, via jQuery, as opposed to on the server.
Last.wp is a WordPress widget that shows your guests what you've been listening to on Last.fm, via a jQuery plugin!