Veusz

Veusz is an interactive graphical scientific plotting and graphing package. It is designed to produce publication-ready PDF output. SVG, EMF and bitmap export formats are also supported. Data can be read from text, CSV, HDF5 or FITS files. In addition, you can also enter, manipulate or examine data from within the application. The program also provides a command line and scripting interface (based on Python) to its plotting facilities. It can also act as a Python plotting module.

In Veusz plots are created by building up plotting widgets with a consistent object-based interface. Plotting types support by Veusz include the following: x-y, function, contour, image, stepped, date, vector field, box, polar, ternary, nested and stacked. Plots can also include multiple axes.