What free software toolboxes exist for displaying a variety of different types of diagrams? For instance, such a toolbox might have calls to generate graphs, pie chart, hyperbolic graphs, TreeMap s, SubBurst s, TouchGraph style graphs, FanDiagrams, trees, EmbeddedCircleDiagram''''''s, etc. Such a toolbox would be a special case of a GUI toolbox like GTK (perhaps GUI toolboxes like GTK are in fact the premier source of diagram toolboxes?) -- BayleShanks I don't think these quite go up to the level of diagrams, but here are some open source lower-level visualization toolboxes/systems: * [http://public.kitware.com/VTK/ VTK]: A library of low-level visualization routines. * [http://www.opendx.org/ OpenDX]: I think this is a system to visualize spatial data. I don't know if it currently functions as a toolbox also (but I believe the code is open source compatible, so you could always scoop out some subroutines). * Khoros: I can't tell at first glance if this is a toolbox or a system. ---- CategoryInformationVisualization