BasicNeeds

This plugin contains these commands:

/gm <number> or /gm <number> <player>
/clear to clear the weather, /clear chat to clear the chat
/day to make it day
/night to make it night
/fly to fly in survival mode
/ping to get your ping
/UUID to get your own UUID
/cow (baby) to spawn (baby)cows that explode when you try to milk them

The permissions:

basicneeds.cowcannon.cow for the /cow command
basicneeds.bettergm for the /gm command
basicneeds.fly for the /fly command
basicneeds.day for the /day command
basicneeds.night for the /night command
basicneeds.clear for the /clear command

For the commands /ping and /uuid there are no permisisons, everybody can use them.