- p.v. and home automation, suffering with Home Assistant and it's design, but since I found nothing better (and few even worse)... So far it serve as a mere web dashboard with few controls and automation, that is limited to regulate hot water heating, for sanitary and home heating usages and limited car charging, in more practical terms just switch-toggling via Shelly Pro 2/Raspi Zero GPIO etc;
- my mail system, local mirror of a hosted one (classic IMAPs/SMTPs on my domain) with mere storage in maildirs, indexed with notmuch, synced to few Emacs/EXWM desktops via muchsync over ssh, I plan for a web frontend (MailPie or Modoboa or Roundcube undecided so far) but done nothing more than few experiments so far;
- a limited prototype of home surveillance and communication, few cams and a netatmo dorbell. I plan to have a real SIP/RTP entryphone but all I found on sale are simply absurdly priced (700+€) and more cam and sensors but so far I can just take a look from remote without cloud crap in between;
- raw file sharing (webdav), NexClound and so on are simply monster in my sysadmin vision to be useful for my needs... I drop files individually in a cache like tree and share links as needed;
- tmate terminal servers to support sporadically some family/friends who are behind NAT when a full remote desktop is too much/not available;
- a small PBX wrapping a "commercial/physical" one simply because find a PCIe asterisk card is equally expensive and also hard, while my ISP do not offer VoIP settings forcing me to pickup it's router FXO...
- a TT-RSS istance for my feeds, I use them normally on deskop but decide to move the instance to the serve for casual on-the-go usage;
- a mere ssh + fwknop shell to access other stuff if needed from remote;
- home backup.
In hw terms a single personally assembled 4U small Celeron based machine with 8Gb ram and 4 sata ssd storage. I have a spare mobo+cpu and I plan to buy a new machine leaving the other as a real ready spare. No real redundancies so far but also no real downtime risks...