Hello,
I ported a package (Highcharts) to deal with charts from VisualWorks-Seaside to Pharo-Seaside. So, if you are implementing Moose applications on the web and you need to use charts, you can try it:
Gofer new squeaksource: 'Highcharts'; package: 'ConfigurationOfHighcharts'; load. (Smalltalk at: #ConfigurationOfHighcharts) perform: #loadDefault
It is possible to create charts of Highcharts JS (http://www.highcharts.com). Here are some examples: http://www.highcharts.com/demo.
regards,