Hey, @pzmyers, here is a federated alternative to Facebook made up of several parts (lifted shamelessly from https://diasp.org/posts/9107128):
* Diaspora - Simplicity, elegance and no extra frills (Site: https://diasporafoundation.org/) (FAQ: https://wiki.diasporafoundation.org/FAQ_for_users) (Tutorial: https://diasporafoundation.org/tutorials)
* Friendica - Conventional/Familiar social network (https://friendi.ca/) (FAQ: https://forum.friendi.ca/help/FAQ)
* Hubzilla - Interconnected websites with a focus on community (https://project.hubzilla.org/) (About: https://project.hubzilla.org/help/en-gb/about/about) (Tutorial: https://project.hubzilla.org/help/en-gb/tutorials/personal_channel) (Video: https://www.youtube.com/watch?v=dSB_767G8Uc)
* Socialhome - Personal profiles with posts and pinned content (https://socialhome.network/)
* GangGo - Still in early development (https://ganggo.github.io/)

With all these, if you post on one, it appears on the others.