PHP/SWF Charts

http://www.maani.us/charts/index.php

Allows you to create Flash charts on the fly in PHP.
Charts don't update as the data changes, unless you refresh, so you'd need to build in auto-page refresh to keep the data real time.

It requires you to be able to get your data into the following format...

$chart [ 'chart_data' ] = array ( array ( "",         "2001", "2002", "2003", "2004" ),
                               array ( "Region A",     5,     10,     30,     63  ),
                               array ( "Region B",   100,     20,     65,     55  ),
                               array ( "Region C",    56,     21,      5,     90  )
                             );

...where the array mimics a 2D table and everything outside the left column and top row is a number.

The gallery of styles is here...
http://www.maani.us/charts/index.php?menu=Gallery

Also see their Web Gauge and Slideshow products

Also see
http://www.amcharts.com/pie/

original tip via Download Squad