Zapotek/arachni — Issue #104: Replace highcharts for licensing issues
Author: spinkham
Created: 2011-11-28 15:16:16+00:00
State: open

Highcharts disallows commercial use.
http://www.highcharts.com/license

The best alternative seems to be:

http://teethgrinder.co.uk/open-flash-chart-2/

Though it does require flash.

There are some others here:
http://alternativeto.net/software/highcharts/?license=free