I finally have a donation page for PayPal, BitCoin, and Ether. As for indirect help, I am almost always looking for more software work--see my resume with contact info. I haven't touched the calculator since 2010, so it's not necessarily a great example of my work anymore, but it still does the job. (Hopefully one day I will rework it.)
The following was an urgent problem in very late 2021 and very early 2022. The urgency is gone for now, but I am still open to barter. At that time I was looking for housing / a room, and I will still gladly trade software services for it.
I can always use software apprentices, if you want to help with the next generation of numerology software.