Immich, Jellyfin, Gonic, Snapcast, Slskd, Audiobookshelf, Transmission, Automatic Ripping Machine, Vaultwarden, Frigate, Home Assistant, Actual Budget, Pocketbase, Vikunja, Forgejo, Readeck, Backrest/Restic, Gotify, Uptime Kuma, Homepage, Caddy, Shared network folder with spouse
I also run Cockpit and Beszel but don't use them often.
Router runs Adguard, Wireguard, and OpenVPN.
I’ve done something similar with a reclaimed mini HP box running Hyper V with alpine VMs
* smokeping
* git ssh for remote repos
* adguard home (DNS filter)
* antigravity CLI
* openclaw
* irssi + tmux (irc keep alive / history)
* rsync gateway for cloud backup to Glacier
* random tasks
The only big memory guzzlers are generally proprietary software, like the unifi network controller software which basically requires an entire room of Cray supercomputers just to view your Wifi AP status.
I specifically look for efficient projects when I have a choice. Also most of my video media is in 720p. The 8 IP cameras I run in lower resolution as well, though that's mainly to avoid network bandwidth issues.
Honestly I have not run into any memory issues.