https://thesephist.com/posts/tools/
It's quite inspiring to see someone succeeding at building his own tools. I also like the fact that his tools are (mostly) simple, just doing the minimal and growing when he needs.
Although I never succeeded at building tools, maybe it was because I never considered them as my own.
I should probably give it another try, it will help me experiment with building my tools for thought.
Also, having my own tools will free me from getting locked by yet another service.
I could try using a combination of Syncthing and Tailscale to have a simple architecture that will not require any DB or authentication.