Mod for the request: Simple Commands
Specific Code: /noclip /invisible /disguise
Reason for asking: Sometimes running a server you want to mess around or easily go places, hide from other players, or disguise yourself as a monster or etc to observe them
What it will do: /noclip will turn clipping off, allowing you to move through blocks.
/invisible true will render your playername, your character invisible, /invisible false will make you visible, /invisible AO will make you appear offline and give the server a log out message
noclip needs a client side modification, i'll see if the real invisibility is possible. I'm not shure if disguise is possible ---Dries007