Software

DESIGN Package for GAP - A package for classifying, partitioning and studying block designs in GAP 4.3 by Leonard H. Soicher. Free download in .tar.gz format, documentation in PDF.
designtheory.org/software/gap_design/

GOSSET - A general-purpose program for experimental designs, by N. J. A. Sloane and R.H. Hardin. Free download of beta-test C source files.
www.research.att.com/~njas/gosset/