Metatable Metamethods Fixes + Customization
TPH

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

Key Binding
1F616EMO

Register callbacks when a key is pressed, holded, or released.

node entity queue
fluxionary

a queue for spreading out the generation of node entities over multiple server steps (smartshops, signs, itemframes, etc).

Position listeners library
karamel

Players' position observing library

Matrix Chat
joenas

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

Wield Events
mt-mods

Events for wield item switching

DeltaTime
SkyBuilder1717

Adds deltatime API

Dialog Redo
1F616EMO

Flexable dialog API

Smart Vector Table
Noodlemire

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

GroupLib
rudzik8

General grouping API

YL Scheduler
AliasAlreadyTaken

Execute tasks based on utc

filter++ lib
rstcxk

provides an API for filtering text

More vector helpers
Hybrid Dog

Adds more vector functions.

B.W Protection
Logikí

This gives API for bad words detection

Local Time and Date Api
Bob64

This is a minetest mod that 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 for this mod.

Natural Entities
nurd3

A lightweight API for spawning random entities

Random API
TheFanne

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

Signs Redux
sorcerykid

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

Node Object
jwmhjwmh

A library for associating objects with nodes

Discrete Player API
Hypernoot

A library for games which attaches players to node grid

Loot
Byakuren

A loot framework.

Shop Dialog
1F616EMO

Formspec-based shop dialog

Pluggable Helpers
sorcerykid

Automated dependency management of helper functions within a distributed architecture

Database Manager
AFCM

Database Manager API

BigNum
ThePython10110

A library that adds a data type for arbitrary precision integers

YL Ticker
AliasAlreadyTaken

Displays messages once per timeframe

Lockbox
Jo5629_

Library for cryptography/encryption functions.

YALib
hutzdog

Yet Another Library

Operating System Detector
TPH

Checks the OS of the device running the mod.

Level API
Hypernoot

A library for games to load levels defined as schematics

status effects
fluxionary

api for defining player status effects

Advanced Breath and Health APIS
liteninglazer

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

Squill
Luke

A subset of SQL. No complex installation required.

Advance ore API
Sere Motsatt

Create complex minerals the easy way

Openai Api
cora

Use AI systems using the openai API

Exploding Chest
Coder12

Api-mod to allow containers like chest to explode if it contains explosive materials.

group:any
1F616EMO

Item group applied to ALL items for crafting recipes.

Archipelago Library
Warr1024

Archipelago multi-world randomizer integration library

description_monoids
fluxionary

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

Stopwatch
sorcerykid

Stopwatch is Lua-based benchmarking API for Minetest developers