dihutenosa

• authoritative DNS for my domain
• email (Postfix, Dovecot, rspamd)
• endlessh
• Matrix chat and video conferencing (nginx, Synapse, MAS, Livekit, coturn, Postgres)
• Prosody elsewhere for failover if international links go down
• Nextcloud
• offsite backups for important data, not the whole OS (rsync)
• QR scanner on a webpage, for transferring complex passwords locally
• Syncthing
• Offsite monitoring (Prometheus, Grafana, AlertManager) - amusingly, on an old ex-Android phone running PostmarketOS (a variant of Alpine). Eats less than a watt of power.
• Wireguard to hook up the monitoring with minimum fuss

Offsite monitoring. It runs Prometheus, Grafana, etc, and watches the rest of my selfhostables. Sends me alerts when stuff goes down.

Besides gardening? I built a low-power, right-sized server out of an ancient phone. It draws around a watt of power, less when idle.