I finally finished the sweater I designed and made for Jon, and here it is:
Jon is a programmer, user, fan, and proponent of free software (similar to open-source software), hence the "free as in freedom." I don't know if the phrase is the official tagline of the Free Software Foundation, but it's the title of a biography of Richard Stallman, the father of the free software movement, and it describes what is meant by "free software." Anyway, I wanted Jon's sweater (the first I've made for him) to be unique to him, and this is what we came up with.
It looks good on him, right? :)