Simon Willison’s Weblog

jsondns. A JSONP API for making DNS queries, with a nice URL structure. 5:37 pm

tipsy. Simple Facebook-style tooltip plugin for jQuery. 6:21 pm

qTip. Advanced tooltip plugin for jQuery, including borders and pointers created using CSS. Very flexible (we used this for the latest MP expenses application) but a little on the heavy side, weighing in at 38KB when minified. 6:23 pm