The Mob API
TX_Miner

Provides a simple API for mobs

Player Visibility Api
erov

Easily manage player visibility in a similar way to area protection

GetName
kevins

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

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.

player attributes
fluxionary

API for defining abstract, compositional player attributes

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

Unified Stamina API
TestificateMods

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

AFK Indicator
1F616EMO

API to check player AFK status

persistent_monoids
fluxionary

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

LCD Font
Nazalassa

A simple font for font_api

Old Wizard Font
Pyrollo

OldWizard font for Font API

Archipelago Library
Warr1024

Archipelago multi-world randomizer integration library

NodeCore Staybs API
Winter94

Movement parameters for various 'staybs'

Advanced Rangefinder
sorcerykid

Extends the API with search capabilities for entities

Nametags2
Logikí

Allow objects had nametags with observers, colors and range

Quest Framework
TeTpaAka

Simple framework to define quests.

Mesecons Stealthnode
Clyde

Register your own Ghoststones.

Trucraft
mt-mods

An alternative crafting system done entirely in the world.

FS51
Luke

Compatibility layer for formspecs

Weapons API
Stix

Adds an API to easily register custom weapons

Debugging Console
sorcerykid

Provides an in-game HUD to easily monitor debug output

Autobox
Just_Visiting

Auto Collision/Selection Loading Boxes

Advanced Breath and Health APIS
liteninglazer

Creates APIS to allow different players to heal health and allow different players to breathe different items.

Function Delayer
Hybrid Dog

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

Guider
1F616EMO

HUD markers for navigation

Fbt Core
Forburnt

A set of utils for other fbt_* mods

Multiblock Lib
Mindcool25

Multiblock structure handler

PostgreSQL Library
Tomlaus

Library for PostgreSQL Db.

more_player_monoids
fluxionary

more player monoids

Item Holders
Jose_ManuelS18

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

Ediblestuff API
lazerbeak12345

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

MFSM Multiple Finite State Machine
Sumi

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

Wield Events
mt-mods

Events for wield item switching

Timekeeper
sorcerykid

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

Stent
AFCM

A formspec based arena entrance type for arena_lib

YAML Config File Library
snowyu

Load or Save YAML config file

Entity Control Function Library
Noodlemire

Adds functions to override and unregister entities.