DigitizeIt digitizes scanned graphs. Graphs can be loaded in nearly all common image formats (incl. gif,tiff,jpeg,bmp,png) or pasted from the clipboard . Digitizing of line and scatter plots occurs automatically, manual digitizing is also possible. Data values are transformed to a specified axes system and can be saved in ASCII format, ready to use in many other applications. Axes can be linear or logarithmic scale. Can handle tilted graphs.

Raster To Vector converter is the most powerful and absolutely free solution for digitizing vector data from image sources. It combines the power of outline vectorizing technology with many unique features such as: Customizable noise suppression; Autoincrease quality for small-sized objects; Intelligent nodes optimization; Bezier Spline smoothing; Automatic contours creation; Full True Color support; Ultrahigh conversion speed etc.

Vextractor is a vectorizer program for transforming raster images into vector formats by building centerlines and outlines. This tool could be used for the vectorizing of charts, drawings, maps and schemes for input to CAD or GIS systems. You can also vectorize logotypes and other line art images for use in Vector Graphic Design software.

FindGraph is comprehensive, feature-rich graph editor, as well as a curve fitting and digitizing tool for engineers, scientists and graduate students. Convert plots back to X,Y data from any published report for later processing and manipulations. The program offers 12 generic fits, including Linear Regression, Logistic Functions, Fourier approximation, Neural Networks, B-splines curves, plus a library of over 300 industry-specific formulas.

LAB Fit is a software for Windows developed for treatment and analysis of experimental data. At LABFit you are able to:

1) Treat similar data;
2) Treat non-similar data;
3) Determine propagated error;
4) Plot 2D and 3D graphs;
5) Execute math calculations (system of equations, roots of function, etc);
6) Curve Fit (almost 500 functions at the library, with 1 and 2 independent
variables, functions finder, rejection of data).