1)   SimplexNumerica 8.0.1
2D/3D technical graphics plotting and data analysis software for your plotting needs. Curve fitting, FFT and a presentation software! Download a demo of our analysis and plotting software!
scientific, plotting, diagram, plot, numeric, charts, data logging, data analyzer, data presentation, data analysis,

 2)   DPlot 2.0.4.1
Graphing software for scientists, engineers, and students. It features multiple scaling types, including linear, logarithmic, and probability scales, as well as several special purpose XY graphs and contour plots of 3D data.
DPlot, FFT, data filtering, plotting software, graph software, math software, science software, engineering software,