YAML Config File Library
snowyu

Load or Save YAML config file

Database Manager
AFCM

Database Manager API

Level API
Hypernoot

A library for games to load levels defined as schematics

Register, Attach & Detach
mzel1982

Register glowing 3D items and custom display nodes that you can easily attach to players, place on walls, or showcase on pedestals.

YALib
hutzdog

Yet Another Library

Bedrock Markup Language
sorcerykid

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

item_monoids
fluxionary

an API for controlling item properties via monoids

Compression Lib
The4spaceconstants

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

DataMiner
sorcerykid

DataMiner is an analytical tool for server operators with a feature-rich API for customized report generation

Wield Events
mt-mods

Events for wield item switching

Advance ore API
Sere Motsatt

Create complex minerals the easy way

Isogen
BuckarooBanzai

Generate isometric images from ingame builds

Unified Stamina API
TestificateMods

Provides a universal API for handling different mods that provide a stamina bar

NucleoTest
DarkXWolf17

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

Phonics Library
Neuromancer

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

YL Ticker
AliasAlreadyTaken

Displays messages once per timeframe

name monoid
fluxionary

flexible control of a player's nametag

typeof
TPH

Provides functionality similar to Luau's "typeof" function

Quest Framework
TeTpaAka

Simple framework to define quests.

PostgreSQL Library
Tomlaus

Library for PostgreSQL Db.

Gettime
1F616EMO

A api to get in-game hour/minute

More vector helpers
Hybrid Dog

Adds more vector functions.

Dialogs
1F616EMO

Dialogs with options

Shop Dialog
1F616EMO

Formspec-based shop dialog

color_lib
bookgirl

adds HEX colouring

Face Objects
1F616EMO

Calculate the facing of objects

Node Damage
Noodlemire

Enables nodes to be partially damaged, and to be repaired afterwards.

Star
Wiz

A* Pathfinding algorithm implementation

Grenades API
LandarVargan

Adds an API for easily creating grenades

Advanced Forceload
Kimapr

a better forceloading API

Telegram
neko259

Integration with telegram messenger chat

Job Control Mod
sorcerykid

A more flexible alternative to the builtin minetest.after function

TPH's Basic Filesystem
TPH

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

verbana
fluxionary

verification and banning

Smart Vector Table
Noodlemire

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

more_player_monoids
fluxionary

more player monoids

filter++ lib
rstcxk

provides an API for filtering text

Chatcommand Library
LMD

Library for registering chatcommands.

register_timer
Bas080

Persistent timers for Luanti mods.

Table Goodies
benrob0329

A small package for extra (can't live without) functions for working with tables.