GGobi is an open source visualization program for exploring high-dimensional data. It provides highly dynamic and interactive graphics such as tours, as well as familiar graphics such as the scatterplot, barchart and parallel coordinates plots. Plots are interactive and linked with brushing and identification.

It includes 2-D displays of projections of points and edges in high-dimensional spaces, scatterplot matrices, parallel coordinate, time series plots and bar charts. Projection tools include average shifted histograms of single variables, plots of pairs of variables, and grand tours of multiple variables. Points can be labelled and brushed with glyphs and colors. Several displays can be open simultaneously and linked for labelling and brushing. Missing data are accommodated and their patterns can be examined.