YL Ticker
AliasAlreadyTaken

Displays messages once per timeframe

Caps Alert
ANAND

Catches chat messages with all-caps and warns / kicks players.

Beamer
Clyde

Beam items or nodes from your inventory to the inventory of your friend.

Server Essentials
jolethen

An essential mod for any server

Spectator Mode
jp

Allows you to watch other players in their 3rd person view.

Teleport Anchor
1F616EMO

Fixed teleport destinations for survival players or adventure map makers

@-Chat
orwell

Adds an alternative Private Message (PM) system

Advanced Playtime
zanderdev

Keeps track of playtime for all players in your world. Notifies you how much playtime you have occasionally.

InvManager
IlzumiZeminori

Allows to check and remove items from players' inventories

VPS Blocker
Lejo

Block players using vpns, proxys or other hosting services

Virtual Key
louisroyer

Adds virtual keys registerers.

Keyring
louisroyer

Adds keyrings.

Minercantile
Mathias

Economy featuring a primitive supply and demand system for exchanging goods.

Kick Player on Death/Respawn
Volik

Kicks player on death or respawn.

Chat2
lag01

Complements game built-in chat or replaces it.

Blacklist Name
ANAND

Blacklist offensive names, forcing players to join with different names.

Interact
Amaz

A mod that gives the interact priv to players who want it and who have agreed to the rules.

Ghosts
LMD

Adds fancy particle ghosts

trashbin
bookgirl

simple /bin and /trash item delete UI.

DoAs
IlzumiZeminori

Execute commands on behalf of another player

Moth
iarbat

Adds moths which can send messages (from Lord of the Rings)

Prejoin Messages
Gregon

Notifies players when a player starts connecting to the server

Exile Snow Fun
TPH

Adds throwable snowballs to Exile

Admin mailing list and report
1F616EMO

Add mailing list for admins and moderators, and a report function

BabelFish Mail
1F616EMO

Translate mails into the player's preferred language

Towny
livphi

Town based protection system

One For All
mt-mods

bans all players if one dies

Grant interact on chat
1F616EMO

Grant newcomers interact only after they speak

Dynamic Passgate
fulgidus

Invite-only server gate with dynamic per-user passwords

Bugbug Chat Logger
bugbug11

Logs chat messages in worlds/worldname/chat.txt

AntiSpoof
1F616EMO

Preventing confusable usernames

No Touch, Griefer!
ROllerozxa

Per-IP interact privilege bans

Vote Night
Holly Mae

Allows players to vote for it to be night

filter++
rstcxk

censors swears in the player chat using the filter++ liberary

Protector Redux
sorcerykid

An efficient and flexible node-based protection scheme for multiplayer worlds

Matterbridge Player Events
cj_clippy

Sends a message to the matterbridge when a player joins/parts

Discord Bridge
Lesha_Vel

Mod + external program providing Discord relaying and commands. This is a fork of discordmt by archfan7411

Kick Vote
rubenwardy

Adds kick voting using the vote API

Extended Protection
1F616EMO

Extended interaction restriction rule

Chat Anticurse
lag01

Kick player out when they type a curse word in chat or using /me or /msg command.