Anti Exploit
LMD

Protects against exploits

Lockbox
Jo5629_

Library for cryptography/encryption functions.

Natural Entities
LuantistDork

A lightweight API for spawning random entities

YALib
hutzdog

Yet Another Library

Pluggable Helpers
sorcerykid

Automated dependency management of helper functions within a distributed architecture

BigNum
ThePython10110

A library that adds a data type for arbitrary precision integers

Position listeners library
karamel

Players' position observing library

Wield Events
mt-mods

Events for wield item switching

Advanced Rangefinder
sorcerykid

Extends the API with search capabilities for entities

Advance ore API
Sere Motsatt

Create complex minerals the easy way

Mapsync
BuckarooBanzai

Synchronize the ingame map with a lua-backend

Squill
Luke

A subset of SQL. No complex installation required.

Stopwatch
sorcerykid

Stopwatch is Lua-based benchmarking API for developers

NameGen
cronvel

Name generator API.

Random API
TheFanne

Provides a simple-to-use framework for selecting random objects with probabilities

Face Objects
1F616EMO

Calculate the facing of objects

Player Settings
1F616EMO

Player-specific settings

Random Messages
1F616EMO

Register random announcements

imfs
Signal_

An immediate-mode, functional, reactive abstraction around Minetest's formspec system.

afk_api
fluxionary

an API for registering events which trigger when a player goes AFK or comes back from AFK.

ConfigFileLibrary
Tomlaus

A library that allows loading and saving data from config files.

item_monoids
fluxionary

an API for controlling item properties via monoids

AoM Settings
Sumi

Provides methods for both player level and server level settings

Chat Games API
Impulse

An API to build chatgames like those in the chatgames

Advanced Chat
LMD

A library for advanced chatting.

rcsv
Wuzzy

RFC-4180-compliant CSV parser and writer

canonical name
fluxionary

api to get the proper capitalization of a name

aSignals
Sumi

Signal event bus API including SIGNAL, LISTEN and CONDITIONAL functions

Local Time and Date Api
Bob64

Provides an API for other mods to use to get a user's preferred date and time format/time zone based on their configured settings

Persistent Effects
epCode

An API for creating persistent effects for any object. eg. damage a player or entity over time. (like poison)

Timekeeper
sorcerykid

Timekeeper acts as a centralized dispatcher for all time-sensitive routines

Luarocks Wrapper
lazerbeak12345

Securely Wrap Luarocks packages without needing trusted mods.

NodeCore Crystals
Winter94

Adds various crystal types to Nodecore

Prop Hunt Modpack
Jo5629_

Transform into nodes and with a minigame.

Advanced Forceload
Kimapr

a better forceloading API

Trucraft
mt-mods

An alternative crafting system done entirely in the world.

Cid Music Player
ekl

Plays music

name monoid
fluxionary

flexible control of a player's nametag

Echo
1F616EMO

In-game notification system

Tips
1F616EMO

Send tips to newcomers