I actually got into onomastics because I knew about a relevant mailing list and I had a summer job that involved spending a ton of time at a computer, once upon a time.

This particular pattern is charted in Richard Rutt's History of Hand Knitting, which is very old-fashioned but still the best single resource for knitting history. I've charted other medieval patterns on graph paper. I haven't gotten serious enough about designing for other people to need a program.

(I wish I understood everything about my research! Though then I guess it wouldn't be research ;) )