Level API
Hypernoot

A library for games to load levels defined as schematics

description_monoids
fluxionary

API to allow multiple mods to make modifications to an itemstack's description

Priority Queue
Wiz

Associate items with priorities to order them.

Persistent Effects
epCode

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

Anti Exploit
LMD

Protects against exploits

CentralAuth
1F616EMO

Player account unification across Luanti servers

Trucraft
mt-mods

An alternative crafting system done entirely in the world.

Advance ore API
Sere Motsatt

Create complex minerals the easy way

NameGen
cronvel

Name generator API.

Smart Vector Table
Noodlemire

API that adds a way to create tables indexed by 3D Vectors.

Face Objects
1F616EMO

Calculate the facing of objects

Advanced Breath and Health APIS
liteninglazer

Creates APIS to allow different players to heal health and allow different players to breathe different items.

MFSM Multiple Finite State Machine
Sumi

Allows for multple states to be active, while maintaining typical state machine behavior. Good for gamestate and mobs.

anarchy
solsword

Anarchy PCG library (see https://cs.wellesley.edu/~pmwh/anarchy/lua/ w/ docs at https://cs.wellesley.edu/~pmwh/anarchy/lua/docs32/index.html)

Metatable Metamethods Fixes + Customization
TPH

Attempts to fix issues with metamethods for Lua 5.1 as well as adding new ones + custom functions

Simple notification wrapper
KirowL

This project offers a Notification System API to display temporary messages on the player's screen, allowing seamless integration of notifications into gameplay.

Pluggable Helpers
sorcerykid

Automated dependency management of helper functions within a distributed architecture

MQTT Client Library
Tuxilio

A mod for MQTT communication

Random Messages
1F616EMO

Register random announcements

status effects
fluxionary

api for defining player status effects

Phonics Library
Neuromancer

Provides a library for creating Phonics (Learn how to read) mods in different languages.

Natural Entities
LuantistDork

A lightweight API for spawning random entities

Openai Api
cora

Use AI systems using the openai API

Random API
TheFanne

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

item_monoids
fluxionary

an API for controlling item properties via monoids

name monoid
fluxionary

flexible control of a player's nametag

Compression Lib
The4spaceconstants

A library that provides functions to procedurally register compressed versions of nodes.

Stent
AFCM

A formspec based arena entrance type for arena_lib

Database Manager
AFCM

Database Manager API

Operating System Detector
TPH

Checks the OS of the device running the mod.

Guider
1F616EMO

HUD markers for navigation

afk_api
fluxionary

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

Minetest Systemd (API)
Piezo_

Debugging utility and compatibility tools for server owners and/or modpack creators

Timed World Modifiers library
karamel

Environmental ABM that could be triggered on a very wide range of nodes but only a few at a time.

FS51
Luke

Compatibility layer for formspecs

canonical name
fluxionary

api to get the proper capitalization of a name

Cid Music Player
ekl

Plays music

Table Goodies
benrob0329

A small package for extra (can't live without) functions for working with tables.

Signs Redux
sorcerykid

Signs Redux is a complete rewrite of default signs that adds many new features

Callbacks API
ANAND

callbacks_api is a framework for registering callbacks if the callback registration function exists, else returns gracefully.