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gnuplot
Gnuplot supports many types of plots in either 2D and 3D. It can draw using lines, points, boxes, contours, vector fields, surfaces, and various associated text. It also supports various specialized plot types.
TecPlot
Tecplot 360 is a numerical simulation and CFD visualization software that combines vital engineering plotting with advanced data visualization into one tool. It allows you to quickly plot and animate all your data exactly the way you want, as well as analyze complex data, arrange multiple layouts, and communicate your results with professional images and animations.
ggobi
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.
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