Debian, QubesOS, Libreoffice, Thunderbird, FreeCAD and KiCAD are all on my short list.

I'm not sure which of these take donations, but I'll find out on Friday.

I don't like what Mozilla is doing with their ToS, but Thunderbird has served me well for years and I have failed to ever make a donation.

Hopefully I don't have to help make PayPal, Visa, Mastercard and the others rich in the process. But I'll use whatever these open source projects support.