yoshinoGRAPH 2.4.1 is a Graphing Software product from www3.ocn.ne.jp, get 4 Stars SoftSea Rating, yoshinoGRAPH is a scientific graph program for data analysis and presentation. You can make 2D and 3D graphs quickly from data files in text format. This program is tiny but includes many basic functions to analyze/edit data as well as rather advanced ones. Followings are some features of yoshinoGRAPH.
Features:
-free
-plot styles: scatter charts, density and 3D plots with options
-double y-axis and shift in y direction are available in 2D graph
-easy to change scales among linear, log and inverse
-polynomial and 3rd spline fits
-manual fit of two independent lines to a data curve
-easy to remove scattered/noisy data
-easy to convert data; quick sort, smoothing, making tables and so on
-to draw a math function on 2D graph using an expression
-to copy a graph as extended-metafile and bitmap formats to paste it on a presentation software
-easy to read many data files saved in different folders

yoshinoGRAPH has been developed just for myself to handle data of transport phenomena of organic conductors but I wish it also assists you to proceed your own research.

Install
-Unzip "yg.zip". Three files ("Setup.Exe", "Setup.Ini" and "Setup.msi") will be extracted.
-If you have ever installed an earlier version of yoshinoGRAPH, uninstall it to run Setup.Exe. Sorry for this inconvenience. Another way is just to replace older yg.exe with new one by copying it to the software folder (e.g. c:\Program Files\yoshinoGRAPH).
-If you want to run the installer, execute "Setup.Exe". Follow its instruction to complete the installation. The license of this design software is Freeware, you can free download and free use this Design software.