Utilities Plugin, for Minecraft servers
Command List:

/dano --> Activate or deactivate players' general damage (they will not suffer fall damage, suffocation damage, player damage, any type of damage that the player has to suffer)

/build --> Enable or disable the build. None of the players will be allowed to build or break blocks in their world unless this command is run again

Note: If you want the source code for the plugin, call discord: imrjoel