From Silk Scientific:
Un-Scan-It software can automatically convert scanned graphical images into (x,y) data at Full Scanner Resolution. Un-Scan-It works with any scanner, digital camera, or other image input device to digitize strip charts, instrumental output, old graphs, published graphs. In addition to the graph digitizing features, Un-Scan-It also integrates peak areas, smooths data, takes derivatives, re-scales graphs, and exports (x,y) ASCII data for use in other software programs.
What's new in this version:
Drag and Drop interface, additional file formats, improved grid line filters, colored data recognition, and graphical data eraser.