Scripted World Editor
Neuromancer

API that allows you pass in scripting tables to fill a series of shapes of different sizes with different nodes

Job Control Mod
sorcerykid

A more flexible alternative to the builtin minetest.after function

FS51
Luke

Compatibility layer for formspecs

timehud
bookgirl

Minimal HUD timer API

GetName
kevins

Adds an API and tool to generate random names for NPCs, mobs, and places.

Priority Queue
Wiz

Associate items with priorities to order them.

Archipelago Library
Warr1024

Archipelago multi-world randomizer integration library

Persistent Effects
epCode

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

Item Holders
Jose_ManuelS18

Adds 'Item Holders', blocks that hold your items in display, also provides a API.

Face Objects
1F616EMO

Calculate the facing of objects

Player Settings
1F616EMO

Player-specific settings

color_lib
bookgirl

adds HEX colouring

Cid Music Player
ekl

Plays music

typeof
TPH

Provides functionality similar to Luau's "typeof" function

MFSM Multiple Finite State Machine
Sumi

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

deploader
LuantistDork

Simple mod API that automates dependency-specific behaviour using a folder-heavy approach.

Doclib
joe7575

A library to generate ingame manuals based on markdown files.

Random Messages
1F616EMO

Register random announcements

More Triggers
SkyBuilder1717

Adds more triggers for Awards

imfs
Signal_

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

Archaeology
SkyBuilder1717

Adds an looting and API in archaeologing

flinv
Luke

API to add new inventory tabs which work across different inventory mods

Advanced Rangefinder
sorcerykid

Extends the API with search capabilities for entities

Extended Protection
1F616EMO

Extended interaction restriction rule

Natural Entities
LuantistDork

A lightweight API for spawning random entities

Grenades API
LandarVargan

Adds an API for easily creating grenades

Phonics Library
Neuromancer

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

Matrix Chat
joenas

This mod creates a bridge between a Matrix channel and the in-game chat!

Advanced Breath and Health APIS
liteninglazer

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

Select Item
Wuzzy

Allows other mods to add a simple form to choose a single item.

Minetest HTTP API QoS control queue
SX

Improve quality of important HTTP requests by grouping requests into service quality buckets.

CSMT Bots (Obsolete)
Logikí

Add bots to your game for training

Japanese Name
Logikí

transform your player name to japaNESE (joke)

Prop Hunt Modpack
Jo5629_

Transform into nodes and with a minigame.

NameGen
cronvel

Name generator API.

Debugging Console
sorcerykid

Provides an in-game HUD to easily monitor debug output

Complete and Total Lua-Only Inventory Rewrite
Noodlemire

Creates a completely custom inventory system, which doesn't rely at all on any of the usual UserData objects.

CentralAuth
1F616EMO

Player account unification across Luanti servers

Anti Exploit
LMD

Protects against exploits

Lockbox
Jo5629_

Library for cryptography/encryption functions.