A couple of useful and silly little commands.

These include: Useful Commands (15)

/fly [player]: Toggles survival flight for yourself or others.
/velocity <player> <x> <y> <z>: Adds a specific amount of "push" in any direction.
/heal [player]: Instantly restores full health.
/feed [player]: Instantly restores full hunger and saturation.
/god [player]: Makes a player completely invulnerable.
/repair: Fixes the durability of the item you are currently holding.
/top: Teleports you to the very highest block above your current position.
/nightvision [player]: Toggles infinite night vision.
/speed <1-10> [player]: Changes walking speed (recalibrated to not break FOV).
/rename <name>: Renames the item in your hand to anything (supports spaces!).
/extinguish [player]: Instantly puts a player out if they are on fire.
/tpall: Teleports every single player on the server to your location.
/back: Teleports you back to your previous location (works after deaths/warps).
/flyspeed <1-10>: Changes how fast you fly.
/stacksize: Increases the item stack in your hand to a full 64.

Silly Commands (17)

/judge <player>: 50/50 chance to ascend to the heavens or be buried alive underground!
/anvil <player>: Summons a falling anvil directly above their head.
/lightning <player>: Strikes the player with a bolt of lightning.
/yeet <player>: Launches a player so high they disappear.
/confuse <player>: Flips their view and adds Nausea/Slowness.
/fakeop <player>: Sends them a fake system message saying they are now an Operator.
/tnt <player>: Spawns a primed, ticking TNT at their feet.
/swap <player1> <player2>: Swaps the positions of two players instantly.
/creep <player>: Spawns a creeper directly behind the target.
/pumpkin [player]: Forces a Cursed Pumpkin (Binding) onto their head.
/rocket [player]: Launches the player up with a trail of explosions.
/freeze [player]: Stops a player from moving or jumping entirely.
/shuffle [player]: Scrambles every single item in their inventory.
/spam <player> <count> <message>: Sends the same message to them up to 50 times.
/slap <player>: "Slaps" them into the air with a red message in their chat.
/blind [player]: Toggles total, infinite blindness for a player.
/fakeban <player>: Kicks the player with a very realistic permanent ban screen.

Commands-o-fun