ChartDirector
• Commercial plugin from MonkeyBreadSoftware• Great range of 2D and 3D chart types
• Academic License: 99 Euro, Commerial License: 199 Euro
ChartPart v2 by Corey Redlien
• Bar, Pie and Line
• LGPL
DataPlot
• classes by Roger Meier
• Line plots and XY with range of markers
• see User Manual for more details including screenshots
• Free donation-ware
GrafThing
• Available from Great White Software’s download page.• line, area & scatter plots
• unrestricted personal use license
GraphCanvas
• Available from Alex Restrepo’s download page.• A canvas that will draw an x,y line graph of one or multiple "datasets", you can modify almost every aspect of the resulting graph.
• Creative Commons license with donation button
Rik and Harry's GraphPanel
• Line, bar or point graph• License not specified.
GraphPro
• Pie, Cartesian and Histogram• Commercial US $75 source included
iChart123
• 2D/3D Column, Stacked Column, Horizontal Bar, Stacked Bar, Line, ARea, Stacked Area, Pie and XY Scatter• free under Creative Commons
Aispire PlotCanvas
• open source or commercial• Pie, cartesian, histogram, scatter