Vision Lib
mt-mods

Common library for PolySaken's mods.

Minetest test framework
BuckarooBanzai

Provides an api to register test functions for integration-tests.

monster_api_gb
Giga_M

add an api to create bosses

Tubelib2
joe7575

A library for mods which need connecting tubes / pipes / cables or similar.

Natural slopes library
karamel

Library to simply add slopes to regular nodes and include them on map generation and when changing the landscape.

Luarocks Wrapper
lazerbeak12345

Securely Wrap Luarocks packages without needing trusted mods.

Advanced Rangefinder
sorcerykid

Extends the API with search capabilities for entities

Player Info [deprecated]
Sumi

[DEPRECATED] Adds a way to track information about the player and controls.

Compression Lib
The4spaceconstants

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

Old Wizard Font
Pyrollo

OldWizard font for Font API

SzUtilPack
Warr1024

A collection of misc dependency-free utilities primarily for server hosts

Resize Me!
VeproGames

Become an Ant or a Giant! Exposes API

Node entity library
The4spaceconstants

Library for functional node entities.

Antigrief
sorcerykid

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

Components Library
Mindcool25

Library for generating components based on base materials

CS:MT (BlockAssault)
Logikí

A first person shooter game with multiple features

Combine Slabs
X-DE

Allows you combine slabs

SSCSM implementation
Luke

A server-sent CSM library.

Visible Wielditem
LMD

Shows your wielditem

Ambient Sounds
SimpleDoodle

Adds environment-specific ambient audio and random atmospheric sound effects

Fluid Container API
IcyDiamond

Library for nodes containing fluids

node entity queue
fluxionary

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

Advance ore API
Sere Motsatt

Create complex minerals the easy way

CentralAuth
1F616EMO

Player account unification across Luanti servers

Discrete Player API
Hypernoot

A library for games which attaches players to node grid

Function Delayer
Hybrid Dog

Allows executing functions after a delay to reduce possible lag (EDD scheduler?)

Comboblock
sirrobzeroone

Allows the stacking of slabs vertically and horizontally

MFSM Multiple Finite State Machine
Sumi

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

Player Settings
1F616EMO

Player-specific settings

anarchy
solsword

Anarchy PCG library (see https://cs.wellesley.edu/~pmwh/anarchy/lua/ w/ docs at https://cs.wellesley.edu/~pmwh/anarchy/lua/docs32/index.html)

More vector helpers
Hybrid Dog

Adds more vector functions.

Luwua
LMD

:3

Xmaps
erle

Adds map items that show terrain in HUD

Dripstone
Noordstar

Add stalactites and stalagmites to your game.

Seasons Clock
solsword

API for getting various "season" parameters based on server time and a few customiable settings. Doesn't change gameplay; just a library that other mods can use to do seasonal things.

Mobkit
mt-mods

Entity API

X Spawners API
SaKeL

Primarily adds an API for registering spawner blocks for other mods to use.

Benchmark Engine
theFox

Engine for running benchmarks ingame.

Multiblock Lib
Mindcool25

Multiblock structure handler

Modding Library
LMD

Multipurpose Modding Library