im2graph
g3data
DataThief III
WebPlotDigitizer
Silkscientific UN-SCAN-IT
GraphClick
jTechDig
Plot Digitizer
Chart It
Datastripes
Charts Factory
Appq.Online Charts
RadarChart.io
AuraPlot
Radar Chart Maker
Tableau
im2graph
Chart Itg3data - g3data is used for extracting data from graphs.
Datastripes - The ultimate data visualization tool that helps you understand your data better, just dragging and dropping nodes.
DataThief III - DataThief III is a program to extract (reverse engineer) data points from a graph.
Charts Factory - Create simple charts super fast and for free!
WebPlotDigitizer - WebPlotDigitizer - Web based tool to extract numerical data from plots, images and maps.
Appq.Online Charts - Advanced chart generation from google sheet data