MotionEye OS is good as a camera surveillance system. Needs a USB camera or a Raspberry Pi camera. Takes a bit of tweaking to get the optimal camera settings (using a GUI), but then it works well. LibeElec is useful as a home theatre setup, based on Kodi.

Second the idea of MotionEye OS - I have one running as a camera for the front door of my house, emailing me when it triggers to my phone's gmail account. So I have a kind of running "backup" of events if anything happens.

I use to run ZoneMinder on an old PC, but it was a bit flakey, way too crazy to set up for a home system; I had learned how to config and admin it over the last several years, but I was just plain tired of it. It's another great system for security cameras, but not really for a home, unless you have a ton of cameras that need monitoring, and don't mind the dedication of a beefy machine to the task.

MotionEye OS is more a distributed solution. It is possible to set it up so one install can monitor multiple cameras (in some manner - I haven't played with it), but I like it as a simple single IP camera turn-key solution. It basically can turn a Rasperry Pi into a cheap wireless IP camera that isn't locked down or tied to a proprietary ($) cloud system.

Using a RasPi Zero W and the cheapest camera you can find, you can build such a camera for under $50.00 USD off Amazon; probably cheaper if you shop around a bit more. The only cheaper option I've found (but it takes more to set it up properly) is the ESP32 camera modules that you can get.

I haven't looked at LibreElec in a while - have they improved the setup for infrared receivers and remotes? That's the main thing that caused me to switch to OSMC. I'm using an IR receiver hooked to the GPIO pins, and OSMC made it quite simple to set up with my old RC6 remote.

PiVPN, if you have the need to remote access your home network:

http://www.pivpn.io/

I have one with rutorrent that acts our house seedbox / file server. I also added droppy as a simple, user friendly file browser for my flatmates. Obviously, this all runs on docker-compose, because I'm a very weak man (but also, it makes managing the whole thing trivial once setup)

I have a raspberry pi zero w that I use with PivPN and Pihole and also I compiled tor on it. I can vpn into my home network , use tor as my socks 5 proxy and I also use pinhole to deal with tracking and advertising. best 5 dollars I've ever spent.