1)   Vextractor 4.00
Vextractor is a vectorizer program for transforming raster images into vector formats. This tool could be used for the vectorizing of photo, drawings, maps, logotypes and other line art images for input to CAD, GIS or Vector Graphic Design software.

 2)   FindGraph 1.88
FindGraph is a comprehensive, feature-rich graph editor, and a curve-fitting and digitizing tool for engineers, scientists and business. Discover the model that best describes your data.

 3)   xyExtract Graph Digitizer 2.4
The "xyExtract" software is used for to extract data from a 2D graph (orthogonal and nonorthogonal axes) contained in a graphic file (scanned, PDF document or in a some file like gif, jpg, etc). The graphic file must be saved in a bitmap file.