QtiPlot

QtiPlot is a free open -source program for analysis and visualization of data.

QtiPlot Origin is based on the proprietary software. With QtiPlot data can be presented in various 2D and 3D graphs. Interpolation of the data can be done with linear and non-linear functions. In addition to the English menu can also install a German.

The source code of the program is available as a free download and can be compiled for all major operating systems. The manufacturer also pre-compiled versions are available, but these will be charged only for different Linux distributions, a version for Microsoft Windows or Mac OS X is chargeable. However, since the source code is under the GPL, which expressly allows a redistribution of the compiled file, there are also unofficial binary packages for Windows, which are free to purchase.