An XY plotting tool
Grace is a point-and-click tool that allows the user to draw X-Y plots. This is the program formerly known as Xmgr.
A few of its features are: User defined scaling, tick marks, labels, symbols, line styles, colors. Polynomial regression, splines, running averages, DFT/FFT, cross/auto-correlation. Batch mode for unattended plotting. Hardcopy support for PostScript, FrameMaker and several image formats.