If I'm being entirely honest I made it in a very 'scratch-my-own-itch' way so you're better off just writing it yourself. Example idiosyncratic choices I went with: all lists are public, allow subscribing to other people's lists, no login required for lists, only Google Chrome support. I doubt anyone else shares those preferences.
I use personal software: https://overmod.org/
If I'm being entirely honest I made it in a very 'scratch-my-own-itch' way so you're better off just writing it yourself. Example idiosyncratic choices I went with: all lists are public, allow subscribing to other people's lists, no login required for lists, only Google Chrome support. I doubt anyone else shares those preferences.