Here are a few of my favorites, some of which are exposed, some are not:

• Mealie - Recipe management. Import recipes by URL is my favorite feature, then I tweak and try it out (I have to be gluten free, so this makes it easy to track what worked for us).
• Homepage - a homepage to put quick links to all of my stuff, neat and clean.
• Grafana - for visualization of current data of my systems, paired with Prometheus.
• Technitium DNS - for all of my DNS needs.
• Jellyfin - for all my media, let’s me pick out what my kids can see/watch without me having to look over their shoulder, along with being a great looking solution for me.
• Immich - photo and video management

All of these (and more, this is just a dsmple of favorites) run on Proxmox. I mostly use LXC over docker, personal preference.

Home Assistant is probably the single most useful for me, already mentioned, just about everything at home is automated/controlled through there.

Same with Barr and Schneider.

Apache guacamole plus your own libreoffice install maybe?

Mod, not admin.

Mod is community level, admin is server level.