New:

/invsee <player> - opens player's inventory
/alert <message> - Broacast a message
/ping [<player>] - /ping your own ping | /ping <player> player's ping
/heal [<player>] - /heal to heal yourself | /heal <player> to heal player
/day - set day on your world
/night - set night on your world
/essentials:version - check when you need to update

Have Fun - DaLoL!