AlphaPlot – Interactive Scientific Graphing and Data Analysis
AlphaPlot is a free and open source scientific data analysis and visualization application for Windows, Linux and Mac OS X. using it you can generate different types of 2D and 3D plots from data. You can also generate plots using from ASCII files, entered by hand, or calculated using formulas. It comes with scripting console, curve fitting, multi-peak fitting and more. And export the plot to image, PDF, EPS or SVG file formats.