SigmaPlot

SigmaPlot is a proprietary software package for scientific graphing and data analysis. It runs on Microsoft Windows.

The software can read multiple formats, such as Microsoft Excel spreadsheets, and can also perform mathematical transforms and statistical analyses. A single, perpetual product license costs between $700 and $1300 depending on academic, corporate, or government affiliation. A free 30-day trial is available as well.

History
SigmaPlot was developed by Jandel Corporation for Windows 3.1x and maintained by them until version 4.0. In 1996, Jandel Corporation merged into SPSS Inc. SigmaPlot was maintained by SPSS through version 8. As of version 9, it is owned and maintained by SYSTAT Software. The current version is 15.x for Windows 2000 to Windows 10. It is now developped by Grafiti LLC.

Alternatives and clones
The main competitors of SigmaPlot are currently Origin and GraphPad Prism. Open-source projects inspired by Origin include QtiPlot (prior to v0.9.9, now proprietary) and SciDAVis.