Thanks for this, @kmf! I answered a few more questions on Quora after I read your answer. This is a good source of distributing info about Seamly!
I saw one of the quora items you posted. I question I answered while trolling a search engine for “free software sewing pattern drafting”. Just for grins I sent yet another message to patternmaker asking if they could retrieve my password for the $30 package of menswear basics I bought in 2012 - to see if they even answer. I also noted that www.leenas.com is now hosted differently, seems to have better response. You have to give it a starting place to get anywhere. The link on the patternmaker site is broken. If you want to see the stuff leena put up in the 90’s go to Leena’s.com: PatternMaker Tutorial Web Site
which is “http : // leenas . com / index . html” with spaces removed