Hahaha I had that in my copy clipboard while typing the post :)

For real though, has any sort of movement or organization tried to alleviate these problems without financial motivation?

I encourage you to read about matrix [https://matrix.org] - the protocol. In addition, there are numerous open source clients to use [https://matrix.org/docs/projects/clients-matrix]. Also, as far as organizations, matrix.org has recently become a foundation moving towards somewhat you described [https://matrix.org/blog/2018/10/29/introducing-the-matrix-or...].

I would say that would not be done by "an app", nor "a service with an API exposed", but by "a protocol" that other/most/all apps follow. Jabber/XMPP comes to mind, so does Matrix.