Homebox - before we relocate - whenever that is, I will be printing labels and putting them under and behind my stuff, scanning it into there and then will use that to keep track of our items after the move to know what is in which box etc.
NocoDB Self Hosted (I use this for a few things) - started out with my network ip's I have on my servers and ports for my containers and most recently a sleep log.
Just a couple there.