Best Free PHP Graphing Script?

I need to create some graph images on the fly so am looking for a free script to do just that. I've found JpGraph which looks pretty good, has anybody had experience with this or can recommend similar scripts.

Thanks

 

I have never used anything like this but there are some amazing flash charts (like the google analytics ones) that can be generated using php.

http://www.flash-db.com/serviceHelp/flashCharts.php

Just searching digg now for the link..............

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

 

Thanks I'll have a look at those.

 

JpGraf is cool, I use it when I need graphs.

 

I've used JpGraph before its great!