A Windows-based sail analysis code is available for download. The code displays Tight Luff, Tight Leech, and Perfect Blend sail shapes as described in the text “Physics of Sailing” by John Kimball. The sails are restricted to zero Gaussian curvature, which means they are “developable” surfaces. Section lift coefficients from foot to head are computed using a two-dimensional, higher-order panel method. Lift coefficients and sail twist are plotted from sail foot to head. The code may be downloaded from the Software page.