http://prdownloads.sourceforge.net/playfair/playfair-0.2.tar.gz?use_mirror=umn http://sarovar.org/download.php/270/playfair-0.5.0.tar.gz http://sarovar.org/download.php/272/playfair-0.5.0.zip http://sarovar.org/download.php/271/playfair-0.5.0.dmg http://hymn-project.org/download.php?dl=dlsrc