Resin  is a free  windows application for a 1-D DC Resistivity Schlumberger data inversion. The data structure is three columns showing AB/2 in meter, apparent resisvity in ohm.m, an the error. The data are simply copied and pasted on the text editor, and the [Plot/Refresh] button is clicked to show the plot. The inversion is carried out by hitting the [Invert] button. The results are shown as a plot and as a text.