jQuery Roundup: Easie, jquery-qrcode, tmpload
Easie

jquery.easie.js (GitHub: jaukia / easie) by Janne Aukia provides CSS3-compatible cubic-Bézier easings for jQuery:
$('selector').animate({ top: 100 }, $.easie(0.25,0.1,0.25,1.0));
There are also predefined easings, with names like easieEaseIn. The easie project page has animated examples of these, with an interactive graphical Bézier curve for changing the parameters.
jquery-qrcode

jquery-qrcode (GitHub: jeromeetienne / jquery-qrcode) by Jerome Etienne generates HTML-based qrcodes, which means they should show up on practically any browser without depending on any server-side image generation.
Like all good jQuery plugins, it’s extremely easy to use:
jquery('#qrcode').qrcode('this plugin is great');
tmpload

tmpload (GitHub: markdalgleish / tmpload) by Mark Dalgleish can load and cache templates intelligently.
Downloading a remote template looks like this:
$.tmpload('search', 'path/to/search.tmpl');
And I thought this deferred example was neat:
$.when(
$.tmpload('search'),
$.getJSON('path/to/data.json')
).then(function(tmpl, data){
$.tmpl(tmpl, data).appendTo('#target');
});