Scripted World Editor
Neuromancer

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

Minetest HTTP API QoS control queue
SX

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

Gettime
1F616EMO

A api to get in-game hour/minute

Persistent Effects
epCode

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

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.

Player Settings
1F616EMO

Player-specific settings

node entity queue
fluxionary

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

Wield Events
mt-mods

Events for wield item switching

Flow Extras
lazerbeak12345

An experimental collection of extra widget APIs for flow

Phonics Library
Neuromancer

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

DeltaTime
SkyBuilder1717

Adds deltatime API

Dialog Redo
1F616EMO

Flexable dialog API

NameGen
cronvel

Name generator API.

filter++ lib
rstcxk

provides an API for filtering text

Chatcommand Library
LMD

Library for registering chatcommands.

Cid Music Player
ekl

Plays music

Weapons API
Stix

Adds an API to easily register custom weapons

persistent_monoids
fluxionary

player_monoids that persist between player sessions and server restarts/crashes.

Minetest Systemd (API)
Piezo_

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

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

AoM Settings
Sumi

Provides methods for both player level and server level settings

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

Bedrock Markup Language
sorcerykid

Bedrock Markup Language is an extensible markup language and API for formspecs.

Discrete Player API
Hypernoot

A library for games which attaches players to node grid

Random Messages
1F616EMO

Register random announcements

Sway
lazerbeak12345

A simple inventory that makes use of Flow forms.

Loot
Byakuren

A loot framework.

Tips
1F616EMO

Send tips to newcomers

Shop Dialog
1F616EMO

Formspec-based shop dialog

Multiblock Lib
Mindcool25

Multiblock structure handler

Pluggable Helpers
sorcerykid

Automated dependency management of helper functions within a distributed architecture

Extended Protection
1F616EMO

Extended interaction restriction rule

Anti Exploit
LMD

Protects against exploits

Database Manager
AFCM

Database Manager API

BigNum
ThePython10110

A library that adds a data type for arbitrary precision integers