I’ve got some standing orders of 1 or 2 euros every month for bigger projects like grapheneos and kde. And for small apps that I actively use, I try to donate 5 or 10 euros now and then. It’s not much but I believe if everyone is doing their part we succeed in the long run


I donate 25€ per month to Droidian. It uses the Android kernel to run a Debian based Linux distro on phones.
Though I would rather see mainline Linux on phones succeed, I believe this could be the best alternative to iOS / Android (OS) until that happens.