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

Old Wizard Font
Pyrollo

OldWizard font for Font API

More Triggers
SkyBuilder1717

Adds more triggers for Awards

GroupLib
rudzik8

General grouping API

name monoid
fluxionary

flexible control of a player's nametag

canonical name
fluxionary

api to get the proper capitalization of a name

Item Tracking
Impulse

Provides a API to mod developers to track which inventories items are in.

Minebase Core
ThatCommand

Adds APIs and new dynamic functionalities.

Isogen
BuckarooBanzai

Generate isometric images from ingame builds

Central Message
Wuzzy

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

Telegram
neko259

Integration with telegram messenger chat

Gettime
1F616EMO

A api to get in-game hour/minute

CentralAuth
1F616EMO

Player account unification across Luanti servers

PostgreSQL Library
Tomlaus

Library for PostgreSQL Db.

Basic HUD textures
Wuzzy

Adds basic but neccessary HUD images: Heart icon, bubble icon, … (for game authors)

Dialogs
1F616EMO

Dialogs with options

Face Objects
1F616EMO

Calculate the facing of objects

YL Scheduler
AliasAlreadyTaken

Execute tasks based on utc

Discord Bridge
Lesha_Vel

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

B.W Protection
Logikí

This gives API for bad words detection

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

aSignals
Sumi

Signal event bus API including SIGNAL, LISTEN and CONDITIONAL functions

Node Object
jwmhjwmh

A library for associating objects with nodes

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

Priority Queue
Wiz

Associate items with priorities to order them.

Grenades API
LandarVargan

Adds an API for easily creating grenades

Persistent Effects
epCode

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

ConfigFileLibrary
Tomlaus

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

Advanced Breath and Health APIS
liteninglazer

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

Advanced Chat
LMD

A library for advanced chatting.

Stent
AFCM

A formspec based arena entrance type for arena_lib

Metatable Metamethods Fixes + Customization
TPH

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

MQTT Client Library
Tuxilio

A mod for MQTT communication

Phonics Library
Neuromancer

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

Operating System Detector
TPH

Checks the OS of the device running the mod.

imfs
Signal_

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

Callbacks API
ANAND

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