- Fine-grained QoS controls via PfSense

- Guest Wi-Fi VLAN with UniFi + PfSense

- NAS with automatic backups of client machines via Syncthing

- Automatic file history of backups with ZFS Snapshots via FreeNAS

- Automatic mirroring of backups to the cloud with Duplicati + Sia

- Home media server via Plex

- Home automation / web dashboard via Home Assistant

- Minecraft server with MineOS in a VM

Those are all things I either have working, or am currently working on setting up on my own network.