Did you have a look on ethical licenses? For example, Coraline Ada Hemke who created the Contributor Covenant (famous code of conduct) started few years ago the Organisation for Ethical Source promoting “ethical” licenses defined by seven principles.

So in fact this third family of licenses is not open source nor free (as defined by OSI and FSF), nevertheless I feel some needs or willings in your side to go, let’s say, “one step further”.

In ethical licenses you can find for example 999 ICU, ACAB, Anti-Capitalist, Peer Production, Hippocratic or some BSD 3-Clause variants about nuclear topics.

You can also have a look on that slidedeck (in French, sorry).

An app? Nope. For notifications, there is open source alternatives to Google and Apple services but it is used in the apps side, not users side. Have a look on microG and Open GApps to flash in your Android device; it might help you.

It seems the “radical” organisations like the FSF or the OES were right and more legitimate in the end.

Enshitification made third-party apps disappeared. Prefer true open source project instead like Pixelfed for example.

Whatever the solution behind is, if you have the resources, move to something self-hosted. Open core or not, if that topic matters to you, you might need something you can own and control. BTW, have a look on Forgejo, Codeberg and Gitea: these are the solutions I see when people look for something FLOSS, not open core, and maybe self-hostable.

I would have said in fact Matrix or XMPP-based solutions but it seems you already have spotted them. Maybe Mattermost?

It seems yet Bluesky has an Android app according to their GitHub repository (https://github.com/bluesky-social/social-app). However indeed nothing mentioned about F-Droid ; maybe some alternative Mastodon clients can also deal with Bluesky?

GitLab because for CI/CD is it far, far much user friendly and comfortable to use with GitLab CI compared to GitHub Actions and flows.

In addition I can integrate templates for CI/CD pipelines already defined with the To Be Continuous project (which is open source).

https://to-be-continuous.gitlab.io/doc/

Very interesting topic in fact, I am not sure a unique and perfect solution exists.

In fact, it depends to how much you earn, how matter does for you the project, how big it is, etc. It is a question of feelings after all.

For example you may want to donate $20 one time to a useful tool you use, but for an app you enjoy using which match your own values you may want to send each year $50. But for some people it is complicated to give money, they need to satisfy their own needs before and people don’t have all the same incomes.

FMPOV, if the project is “just a tool” it can be a $20 one shot. If I use the software daily, it can be $50 per year. Maybe more if I feel it will help.

About the transaction medium, it depends. Projects can use Liberapay, others PayPal or Open Collective, or also in-app purchases. I don’t use cryptocurrencies because of the transactions fees.

Hope it helps!

Yeah, reach the FSF like explained in previous comments. Or maybe contact some attorney if it matters because you may face expensive litigations… Big companies are not friendly. Or maybe contact the SFC (https://sfconservancy.org/).