im2graph
g3data
DataThief III
WebPlotDigitizer
Silkscientific UN-SCAN-IT
GraphClick
jTechDig
Plot Digitizer
graph2table
WebPlotDigitizer
Plot Digitizer
Graphreader
DigitizeIt
GraphClick
Finally a automatic plot digitizer, can't believe it took this long to get this
g3data - g3data is used for extracting data from graphs.
WebPlotDigitizer - WebPlotDigitizer - Web based tool to extract numerical data from plots, images and maps.
DataThief III - DataThief III is a program to extract (reverse engineer) data points from a graph.
Plot Digitizer - All-in-One Tool to Extract Data from Graphs, Plots & Images
Graphreader - Graphreader is a simple browser-based tool for extracting numerical values from images of graphs and plots, then exporting the data into CSV files.
Silkscientific UN-SCAN-IT - Digitizing Software converts graph image files to usable (x,y) data automatically