This is a great list and thanks for posting it.
Also, the pixelfed guy needs to give up full control of his project (no matter how nicely or reasonably he argues "not yet"). I have asked on mastodon and nobody seems to know of anyone else who truly understands the project so if he dies or gets disappeared the project... Dies? Maybe? More concerningly, it isn't open source. He cotes good reasons for this (the massive labor to refactor and whatever else goes into open sourcing a functioning project), but he also occasionally humblebrags about being offered huge sums of money to sell it to corporations. I suspect it will become corporate at some point if he doesn't open source it soon.