I found since the web page of Ted Spence from Scotland.

Some symmetric designs can be found on my website

http://www.math.uniri.hr/~sanjar/structures/ . Readme.txt file contains

some information about the structures.

I have a collection of small symmetric 1-designs.

In the handbook of combinatorial designs by Jeff Dinitz and Charles Colbourne there is a table of symmetric designs. Is there a particular design or a particular type of symm design you are interested in? Symm bibd's are of great interest to me.

There are some tables about infinite families of symmetric designs as well as some sporadic ones in the monograph "Combinatorics of Symmetric Designs" by Y.J. Ionin and M.S. Shrikhande (Cambridge University Press, 2009).

Many thanks Mohan!

I just happen to pirate this book recently. ;=)

Nice to hear from you, Patrick!