My main "user-facing" applications are:

* Blue Iris - for video surveillance

* Home Assistant

* Jellyfin

My main backend things are:

* Node-RED - for more complicated home automation than can be reasonably built in Home Assistant

* deCONZ - for my Zigbee lights and sensors

* PostgreSQL

* StrongSwan and Wireguard VPNs - I'm still evaluating Wireguard. I like the simplicity, but there are some things that I can do with StrongSwan that I can't do with WireGuard (specifically, split-DNS).

* Pi-hole

* Kubernetes - I'm just playing with this at the moment, but I'm running Pi-hole in it as it's not a critical service.

* Nginx - reverse proxy and TLS termination.

* TrueNAS Core on a QNAP NAS

I'm sure there's some I missed.