I'd take a look at the RRD Tool library (http://oss.oetiker.ch/rrdtool/). It has a fair number of interfaces already written and is specifically geared towards dynamic charting and graphing. It's also released under the GPL. Judah John DeStefano wrote: > Some folks at work are developing a Java/Netbeans app that will allow > collaborators, who deal with tons of data, to reserve end-to-end paths > of guaranteed bandwidth through a network. > > They've asked me for help with a semi-attractive user interface for > this web app. Are there any preexisting efforts or applications that > graph or chart data (time vs. bandwidth channel), and make the chart > interactive so it zooms in on click and allows a user to choose an > open slot? > > I've found a few bandwidth monitors, but they were full-fledged apps > and didn't offer much in the way of interaction.