matplotlib (python) is quite good: http://matplotlib.sourceforge.net/gallery.html http://matplotlib.sourceforge.net/gallery.html another python tool to conside

matplotlib (python) is quite good: http://matplotlib.sourceforge.net/gallery.html http://matplotlib.sourceforge.net/gallery.html another python tool to consider is chaco: http://code.enthought.com/projects/chaco/gallery.php http://code.enthought.com/projects/chaco/gallery.php matplotlib is ideal for matlab-style iterative plotting. chaco is considerably faster (at least ~1 year ago) as it is specifically designed for creating interactive plots. if you need 3d graphics, consider the mlab library used in mayavi and some other projects. the commands are matlab-like, and it produces very nice graphics using vtk: http://github.enthought.com/mayavi/mayavi/auto/examples.html http://github.enthought.com/mayavi/mayavi/auto/examples.html