MoreCommands
MoreCommands is a fairly advanced mod that adds many commands, gamerules, client tweaks and more.
Almost all features of the mod are either documented here or soon will be.
The mod is completely free, but any donations are greatly appreciated and can be made to
my PayPal
or my GitHub Sponsors page.
Have a look around this docs site to see what this mod has to offer and if you wish to download it, you can do so either on CurseForge or Modrinth.
For a graph of the downloads MoreCommands has on CurseForge, have a look here.