As part of my work on Vessel of Sin, I coded a handful of plugins to make my life easier. After completing that work, submitting my build, just finishing everything, I decided that I might as well also clean up, separate, and release all the custom code that I wrote for the game, just in case anyone else needs them.
Most of my plugins that I wrote are available here:
https://rpgmaker.net/users/MoonMoonGames/submissions/?&q=scripts
There's a few more that aren't listed on RMN yet, but they're public on my GitHub, available here:
https://github.com/AntonUklein/MoonMoonRPGMaker/
In case anyone's interested, they are
available for use in non-commercial and commercial games, see the GitHub for licensing details.
As for Vessel of Sin, will I continue working on it? Perhaps. It's a good start.