Engauge Digitizer - This open source, digitizing software converts an image file showing a graph or map, into numbers.
ImageJ - and Other Health Care
WebPlotDigitizer - WebPlotDigitizer - Web based tool to extract numerical data from plots, images and maps.
Avogadro - Avogadro is a free, fantastically easy to use molecule editor.
Plot Digitizer - All-in-One Tool to Extract Data from Graphs, Plots & Images
ACD/ChemSketch - ACD/ChemSketch for personal and academic use brings the power of our structure drawing package to your home computer.