QtiPlot

QtiPlot is a professional scientific data analysis and visualisation solution. It is meant to be a cheap alternative to proprietary and costly software such as Origin, SigmaPlot, Regressi or Igor Pro.Precompiled binaries are available for a very low price, making this software easily accessible for students ; the source code is freely downloadable, but compilation might be a little tricky. Precompiled packages are also available in some Linux distributions for free.QtiPlot is used for teaching as well as for complex data analysis and visualisation in companies, high schools, universities and reseach institutes all over the world.Features:Cross-platform: works natively on Windows, Mac OS X and Linux/Unix systemsFully Python scriptableOpenGL based 3D plottingPublication quality plots and easy export to various image formats (EMF, EPS, PS, PDF, SVG, BMP, JPG, PNG, TIFF, etc …)Easy integration with LaTeX typesetting systemPowerful and versatile spreadsheets with column-logic calculations and easy import/export of multiple filesOne-click access to extensive built-in data analysis routinesLinear and nonlinear curve fitting with weighting and estimation of statistical errors of the fit-parametersMulti-peak fittingImage analysis toolsTemplates support: all settings for plots, tables and matrices can be saved and restored later on for a fast editing processProject files based on folders, a powerful project explorer with built-in drag and drop and searching facilitiesFull import of OriginLab® Origin projects, Excel workbooks and Open Document Format spreadsheets