RepTiles is an interactive Macintosh application for designing and systematically generating all possible periodic tilings of the plane, by applying "topological transformations" and "symmetry-breaking and -making".
Developers: Daniel H. Huson and Olaf Delgado Friedrichs form the University of Bielefeld. Email: huson or delgado @mathematik.uni-bielefeld.de
Availability: by anonymous ftp at ftp.uni-bielefeld.de:/pub/math/tiling/reptiles