A Minecraft server running MC Java 1.20.4

Installed Plugins.

DisplayName
Change your name in the game.
/displayname YourNewName

DynMap
See the known world, cave system, Nether and The End.
Also supports markers using either /dmarker or [Dynmap] on the first line of a sign.

GriefDefender
Create claims and protect your property. Assign permissions for different levels of access to other players.
The amount of blocks you can claim is determined by the length of time you stay logged in to the server. Equipping a Golden Shovel will tell you how many unclaimed blocks you have.
Use a Golden Shovel to mark out the two opposite corners to create a claim.
Click with a GS within a claim to see the claimed area. RMC on a corner to resize it.

A few commands.
/trustall PlayerName – Gives PlayerName full permissions to all of your claims.
/gd trust group public accessor – Gives everyone access to the claim you are currently in. This does not allow them to build or access items in chests. Access levels are: Accessor, Container, Builder and Manager.
/claimdisplayname – Give your claim a name.
More info.

TreeFeller
Fell trees in one go, by chopping the lowest log.

WhatIsThis 
Find out what you’re looking at by RMC on the block with a piece of coal.

AutoReplace
Automatically replaces the current item when it runs out or breaks, as long as you have a replacement in your inventory.

ChestSort
Used to sort cheats and inventory.
/chestsort

CoreProtect
This was added when the server had some unusual activity from some random players. It keeps a log of changes and allows us to find out who has changed something that they may not necessarily should have done. Griefdefender should protect players from having anything they create changed or destroyed, however if anything does happen we can find out what and who changed something.

These are all used by GriefDefender, but do add extra functionality.
EssentialsX and EssentialsXChat

LuckPerms
Permissions system.

Vault
Used for trading.

There is also a number of plugins allowing access from Bedrock Edition on consoles and mobile devices, however these may need a third party app on the device to connect.