Here is a list with most commands that you can use on the server.
/help - Displays all available commands.
/glist - Displays all players online on all the servers.
/list - Displays all staff online on your current server.
/Spawn - Teleports you to spawn.
/Server (Minevival/Lobby) - Switch to the chosen server.
/warp - List all available warps. There also is a warp list from the server on the wiki.
/near- See which players are near you.
/getpos - Displays your current position.
/kit - Views a specified kit or lists all available kits.
/home - Teleports you to your home or lists your available homes.
/sethome - Sets a home at the current place.
/ignore - Ignore or unignore other players.
/rules - Views the server rules.
/realname = Displays the username of a user based on a nick.
/seen - Shows the last log-out of a player.
/helpop - Ask all online staff members for help.
/tpa (player) - Will send a teleport request to that player, asking for you to teleport to them.
/tpahere (player) - Will send a teleport request to that player, asking for them to teleport to you.
/tpaccept - Accept a teleport request.
/tpdeny - Deny a teleport request.
/tptoggle - Blocks all forms of teleportation.
/back - Teleport to your previous location.
/msg (name) (Message) - Send a private message to another player. (Aliasses: /whisper, /w, /m, /tell)
/reply (Message) - Reply to a message. (Aliasses: /r)
/ignore -Ignores another player's chat messages.
/money - List your balance.
/money balance (player) - Display the balance of a player
/money pay (player) (amount) - Send money to another player
/balancetop - Shows the top 10 richest players. (Aliasses: /baltop)