jQuery Calx is powerful yet easy to use jQuery plugin for building calculation forms or calculation tables. It parses provided formulae and performs calculations, scans for form changes and updates results automatically, and formats plain numbers into currency format, ordinal numbers, etc. It is suitable for both simple ($A+$B) formulae and complex ones such as ($I*$P*((1 + $I)^$N)) / (1 - ((1 + $I)^$N)).
Slim HTML5 Audio jQuery Plugin is a very simple jQuery plugin to embed an audio player. It can insert HTML to play a given audio file using the HTML5 audio tag. It also inserts the embed container tab as fallback when the audio tag is not supported by the Web browser (e.g., IE7 and 8).