Below is a list of basic commands that any member will have access to. There are other (less useful) commands available, but you can figure them out as you go.
/who- See who is currently online and in what world they are. Don't forget you can also use [Tab].
/i [itemname] [amount]- Give yourself items.
/gamemode [survival/creative/...]- Change your gamemode.
/heal- Heal yourself.
/spawn- Get back to the spawn.
/warp [worldname]- Warp to a specific world on the server.
/warp [warpname]- Teleport to the given warp. (Tip: Use
/toinstead for autocompletion)
/warp list [-c creator -w world]- List all or specific warps.
/warp create [warpname]- Create a new warp with the given name at your current location.
/slay- Kill yourself =S
/tpa [playername]- Request a teleport to a player.
/tpauto- Automatically accept teleport requests.
/msg [playername] [message]- Message a player in private.
/r [message]- Reply to the last received message.
/mail [send/read/clear]- Send and receive mail. The receiving player will be notified of mails when they log in.
/whereami [playername]- Get your location.
/clear [**]- Remove your inventory [and gear].
/ping- Get a response from the server to see if you experience any lag.
/sethome- Teleport to and set your home. You can only have one home across all worlds.
/afk- Set your status to Away From Keyboard. This happens automatically after 5 minutes of inactivity.
/ignore [player]- Ignore someone (stop receiving messages and chat from them).
/ptime [@][day/night/dawn/...]- Set your own time to a custom value, @ fixes it so it stays the same.
Note that most of the utility commands (like
/spawn) will work in any world, but not all commands will work in vanilla.
Check out the donating page to see what additional commands and features are are available to donators.