ReSpec
ZenonSeth

Easy and Versatile Formspec Creation based on ConstraintLayout

persistent_monoids
fluxionary

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

Weapons API
Stix

Adds an API to easily register custom weapons

Nodecore Mod Resource Library
Winter94

Resources to be used for NC Content

Tasks Framework
AntumDeluge

Framework for adding tasks & quests.

LCD Font
Nazalassa

A simple font for font_api

The Mob API
TX_Miner

Provides a simple API for mobs

Pillars
citorva

Add a lot of pillars for fun.

Advanced Fight Library
SFENCE

Library for implementing advanced combat systems with hitbox-based damage and body part health tracking

Smart Chat
Clyde

A new, lightweight, simple and modular Chatsystem

Antigrief
sorcerykid

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

Vision Lib
mt-mods

Common library for PolySaken's mods.

Chatcommand Library
LMD

Library for registering chatcommands.

Fbt Core
Forburnt

A set of utils for other fbt_* mods

Babelfish Redo
1F616EMO

Translate chat messages into other languages

Entity Control Function Library
Noodlemire

Adds functions to override and unregister entities.

Central Message
Wuzzy

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

Isogen
BuckarooBanzai

Generate isometric images from ingame builds

Noriel Sylvire's Minerals Core Modpack
Noriel_Sylvire

An API for automatically registering recipes, nodes and ore generation.

VizLib
OgelGames

Visulization Library

Trucraft
mt-mods

An alternative crafting system done entirely in the world.

Players Effects
SFENCE

Provides predefined attribute effects for players ncluding movement, vision, and brain concussion effects. Apply logic is not included.

Inventory Change Callback
luarocks

Provide a global callback for handling player inventory changes.

NodeCore Crystals
Winter94

Adds various crystal types to Nodecore

Mapsync
BuckarooBanzai

Synchronize the ingame map with a lua-backend

Autobox
Just_Visiting

Auto Collision/Selection Loading Boxes

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.

Ediblestuff API
lazerbeak12345

A unified API for making items, tools and armor edible. Eat armor while wearing it!

Star
Wiz

A* Pathfinding algorithm implementation

Job Control Mod
sorcerykid

A more flexible alternative to the builtin minetest.after function

timehud
bookgirl

Minimal HUD timer API

GetName
kevins

Adds an API and tool to generate random names for NPCs, mobs, and places.

Persistent Effects
epCode

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

Function Delayer
Hybrid Dog

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

Journal
theFox

Do you want to add story to your game? Make your protagonist write notes into his Journal.

Item Holders
Jose_ManuelS18

Adds 'Item Holders', blocks that hold your items in display, also provides a API.

NodeCore Staybs API
Winter94

Movement parameters for various 'staybs'

MFSM Multiple Finite State Machine
Sumi

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

deploader
LuantistDork

Simple mod API that automates dependency-specific behaviour using a folder-heavy approach.

Doclib
joe7575

A library to generate ingame manuals based on markdown files.