A social network without the bad stuff, built on the peer-to-peer SSB protocol. It's free and open source, and available for desktop and mobile.
Manyverse is libre software avowedly not LibreSaaS, as it is designed to run on your device and counts being non-commercial as a key feature:
Manyverse is a social networking app with features you would expect: posts, likes, profiles, private messages, etc. But it's not running in the cloud owned by a company, instead, your friends' posts and all your social data live entirely in your phone. This way, even when you're offline, you can scroll, read anything, and even write posts and like content! When your phone is back online, it syncs the latest updates directly with your friends' phones, through a shared local Wi-Fi or on the internet.
We're building this free and open source project as a community effort because we believe in non-commercial, neutral, and fair mobile communication for everyone.
That said, the options to sync when you are not in physical proximity include room servers or pub servers so there is actually a major use for servers for Manyverse or any application implementing the Secure Scuttlebutt (SSB) protocol. That is, there could be a paid "pub" and that pub could use some of the revenue to fund Manyverse development. We don't know of any instance of that occurring, however.
Note: To be clear, something not being LibreSaaS does not mean "not recommended", even by us! LibreSaaS is only one (good!) option for aligning project development with its community's needs while providing resources for that very development.