The matrix server electrologic.org Matrix server is public and free to use for anyone. I operate this service for myself, but I welcome anyone as long as I don't have to buy more server hardware. The server runs on continuwuity and has a livekit based Matrix-RTC backend attached.
It is expected by each user to following decent behaviour and not conduct illegal activities (Germany jurisdiction) on this server. That means it is not a space for racists, facists and all other assholes. If there are substantiated complaints about a user of this service, the user will be banned.
You may reach me via mail (matrix@electrologic.org), jabber (sake@electrologic.org) or matrix (@sake:electrologic.org). I'll try to respond in a timely manner.