Quote Originally Posted by Astronomy View Post
QtiPlot:
http://soft.proindependent.com/pricing.html
Hmm.. they claim to put it under GNU license but want to have a fee.
AFAIR the fee is for support and packaging only. On Linux systems this is of no relevance because you have packages from your distributor - on Mac and Windows it means you have to build QtiPlot yourself.

Uwe