This DotNetNuke module uses jQuery jplayer to play audio and video files. It allows you to create your own play list or play audios from Podcast feed. It's lightweight and easy to use. And the UI is customizable: totally skinnable using HTML and CSS. There are four skins already in the package.
The A Chart is an easy usage DNN module that allows you to add financial, scientific, engineering, business or any kind of relevant data to charts. It supports 30+ chart types including column, bar, line, area, pie, donut, OHCL, candlestick etc. It supports data from database, files or external Url.