player attributes
fluxionary

API for defining abstract, compositional player attributes

Scripted World Editor
Neuromancer

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

Discrete Player API
Hypernoot

A library for games which attaches players to node grid

Events API
TPH

API for creating, handling, and permitting function registration calls for custom events

Old Wizard Font
Pyrollo

OldWizard font for Font API

Nametags2
Logikí

Allow objects had nametags with observers, colors and range

Chatcommand Library
LMD

Library for registering chatcommands.

Simple notification wrapper
KirowL

This project offers a Notification System API to display temporary messages on the player's screen, allowing seamless integration of notifications into gameplay.

monster_api_gb
Giga_M

add an api to create bosses

Ediblestuff API
lazerbeak12345

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

FS51
Luke

Compatibility layer for formspecs

Player Visibility Api
erov

Easily manage player visibility in a similar way to area protection

Natural Entities
LuantistDork

A lightweight API for spawning random entities

Interactive Item API
Jose_ManuelS18

Provides an API to make it easier to implement items' inner workings.

Multiblock Lib
Mindcool25

Multiblock structure handler

Trucraft
mt-mods

An alternative crafting system done entirely in the world.

Central Message
Wuzzy

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

AFK Indicator
1F616EMO

API to check player AFK status

Isogen
BuckarooBanzai

Generate isometric images from ingame builds

status effects
fluxionary

api for defining player status effects

Complete and Total Lua-Only Inventory Rewrite
Noodlemire

Creates a completely custom inventory system, which doesn't rely at all on any of the usual UserData objects.

Entity Control Function Library
Noodlemire

Adds functions to override and unregister entities.

Archipelago Library
Warr1024

Archipelago multi-world randomizer integration library

NodeCore Staybs API
Winter94

Movement parameters for various 'staybs'

Timekeeper
sorcerykid

Timekeeper acts as a centralized dispatcher for all time-sensitive routines

YAML Config File Library
snowyu

Load or Save YAML config file

GetName
kevins

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

Player Settings
1F616EMO

Player-specific settings

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.

TPH's Doors API Redo
TPH

(INTENDED FOR DEVELOPERS) Attempts to ease and better simplify door mechanics + registration

Mapsync
BuckarooBanzai

Synchronize the ingame map with a lua-backend

Face Objects
1F616EMO

Calculate the facing of objects

Unified Stamina API
TestificateMods

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

Grenades API
LandarVargan

Adds an API for easily creating grenades

Function Delayer
Hybrid Dog

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

Tasks Framework
AntumDeluge

Framework for adding tasks & quests.

ConfigFileLibrary
Tomlaus

A library that allows loading and saving data from config files.

DataMiner
sorcerykid

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

name monoid
fluxionary

flexible control of a player's nametag

Advanced Rangefinder
sorcerykid

Extends the API with search capabilities for entities