This was initially demoed at FediCon 2025, but CrowdBucks is an open source, self-hostable fundraising system that allows people to financially support one another. You use your existing Fediverse account to hold a fundraiser, and can also donate to other people’s fundraisers as well. The form factor is kind of similar to Kickstarter or Patreon.
immich does not accept donations anymore, they “sell you a license” (there was a loot of drama for this…).
jellyfin does not accept donations at all. they say that in the website.