In-Game Commands

Informational

/help - opens a list of all commands with documentation
/aii - search for advanced information on items
/list - lists online players
/homes - gui list of your home warps (max of 36)
/xp - see all your stats/progressions/unlocks
/wiki - provides a link to the wiki
/wiki hand - open a wiki page for item in hand
/wiki <search term> - search the wiki for the most relevant entries
/ehelp - Shows all the elite essentials commands you have permission to use

Social Interactions

/msg <username> <message> - send a private message
/reply or /r - reply to the last private message you received
/emotale - select an emote
/p or /party - open party menu
/p info - shows party info
/ping - ping a block for your party

Teleportations

/spawn - Takes you to spawn
/sethome <name> - sets your location to a returnable teleport
/delhome <name> - delete a chosen home location
/home <name> - takes you to a chosen home location
/tpa <username> - request to teleport to another player
/back - teleports you back to where you died

Land Ownership

/easyclaims claim - claims the chunk you're standing in
/easyclaims unclaim - unclaim the chunk you're standing in
/easyclaims help - shows all claim related commands

Marketplace

/pay - open the payment gui
/market - open the marketplace browser
/market --action=sell - open the sell interface
/market --action=my - view your own listings and stats
/market --action=help - show available market commands

Support

/report <Player> <Reason> - report another player for RULE VIOLATIONS ONLY