afk_api
fluxionary

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

Libox
frogTheSecond

A sandboxing library

Advanced Rangefinder
sorcerykid

Extends the API with search capabilities for entities

Noriel Sylvire's Minerals Core Modpack
Noriel_Sylvire

An API for automatically registering recipes, nodes and ore generation.

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.

Lush
rstcxk

fully featured shell interpreter

Advanced Fight Library
SFENCE

Library for implementing advanced combat systems with hitbox-based damage and body part health tracking

Old Wizard Font
Pyrollo

OldWizard font for Font API

Minetest Teams
pl608

simple multiplayer team system

More Triggers
SkyBuilder1717

Adds more triggers for Awards

status effects
fluxionary

api for defining player status effects

Debugging Console
sorcerykid

Provides an in-game HUD to easily monitor debug output

Loot
Byakuren

A loot framework.

Wield Events
mt-mods

Events for wield item switching

Isogen
BuckarooBanzai

Generate isometric images from ingame builds

Central Message
Wuzzy

Simple API to show messages to the center of the screen to players.

Gettime
1F616EMO

A api to get in-game hour/minute

Compression Lib
The4spaceconstants

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

CentralAuth
1F616EMO

Player account unification across Luanti servers

PostgreSQL Library
Tomlaus

Library for PostgreSQL Db.

Dialogs
1F616EMO

Dialogs with options

Cid Music Player
ekl

Plays music

Face Objects
1F616EMO

Calculate the facing of objects

Discord Bridge
Lesha_Vel

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

Antigrief
sorcerykid

An API for validating node and item placement via a simple callback mechanism.

Interactive Item API
Jose_ManuelS18

Provides an API to make it easier to implement items' inner workings.

Trucraft
mt-mods

An alternative crafting system done entirely in the world.

NucleoTest
DarkXWolf17

Battle Royale-like game. Provides an API and a reference implementation. Highly radioactive. Work in progress.

Star
Wiz

A* Pathfinding algorithm implementation

Job Control Mod
sorcerykid

A more flexible alternative to the builtin minetest.after function

aSignals
Sumi

Signal event bus API including SIGNAL, LISTEN and CONDITIONAL functions

group:any
1F616EMO

Item group applied to ALL items for crafting recipes.

TPH's Basic Filesystem
TPH

API for loading files into a basic readable format as well as loading and converting conf files

Advanced Forceload
Kimapr

a better forceloading API

Chatcommand Library
LMD

Library for registering chatcommands.

deploader
LuantistDork

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

Persistent Effects
epCode

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

Advanced Breath and Health APIS
liteninglazer

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

action queues
fluxionary

provides an API for queuing things for batch processing w/ various ways to specify the batch "size".

MFSM Multiple Finite State Machine
Sumi

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