As we're going to start a fresh season of the SMP, here's bunch of plugins that I've heard of:
- UltimateTimber
The plugin lets players cut down an entire tree by breaking one wood block using a pickaxe.
- mcMMO
"Skill leveling, special abilities, rare loot, brand new mechanics and a more in-depth PvP"
- Dynmap / Bluemap
Just like Google maps, but for Minecraft worlds, and accessible with a link. (iirc) Bluemap includes 3D-models as well.
- Slimefun (and some of the addons)
I cannot really explain what Slimefun is, as it adds "over 500 new items and recipes to Minecraft". Adds new machines, items, armors, etc. that are not easy to obtain, and it's a plugin so it only has to be installed on the server's side.
- ItemsAdder
As requested for custom items to be added using a resourcepack, that's what ItemsAdder does.
- Waystones
Currently you can /sethome multiple times and set different homes under different names. Using a waystones plugin forces the players to craft waystones to be able to teleport to their other waystones they placed in the world, and then one /sethome can be allowed for each player.
- LevelledMobs
Adds a level system to each mob, that appears in the mob's nametag.
- Ultimate Airdrops
Once a while, there's an airdrop, with an announcement message in the chat containing the coordination for it. The loot inside the chest is also configurable, and it expires after a set time.
- AntiPopup
Basically no chat reports.
- DiscordSRV (and DiscordSRVUtils)
The channel to be used for this can be #👾︱smp-chat. The plugin transfers messages from the game chat to Discord, and vice versa.
- Simple Voice Chat
Add the plugin so we can use the mod in the server!
- Minepacks
Adds backpacks to the game, useful when your inventory is about to be full.
and in my opinion, honestly just keep everything else the way it currently is. keepInventory, a kit for food, and landclaims should remain the way they currently are.