GGobi

GGobi is a free statistical software tool for interactive data visualization.

GGobi allows extensive exploration of the data with Interactive dynamic graphics.

The program developers went through many name changes before settling on GGobi (A combination of the words GTK+ and the Gobi Desert).

[3] Current version for MS Windows is 2.1.10a (12 March 2010) with an update for 64 bit usage from 10 June 2012.

Using the different tools within GGobi, clusters, non-linear distributions, outliers, and other important variations in the data can be discovered.

This shows a projection from a 2D tour of 6D, where three clusters are visible. Two points are highlighted as yellow, which appear in the same color in other plots.
Parallel coordinate plot linked to scatterplot, show traces of the two points highlighted in the scatterplot