Scripted World Editor
Neuromancer

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

Old Wizard Font
Pyrollo

OldWizard font minetest mod for font API

Player Visibility Api
erov

Easily manage player visibility in a similar way to area protection

Lockout
ApolloX

Late-stage Security for Servers

Trucraft
mt-mods

An alternative crafting system done entirely in the world.

player attributes
fluxionary

API for defining abstract, compositional player attributes

NodeCore Staybs API
Winter94

Movement parameters for various 'staybs'

FS51
Luke

Compatibility layer for formspecs

Advanced Breath and Health APIS
liteninglazer

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

Fbt Core
Forburnt

A set of utils for other fbt_* mods

Keyevent
DS

Adds an event for when player presses a key.

hand_monoid
fluxionary

player monoid for controlling the look and abilities of the player's hand.

More vector helpers
Hybrid Dog

Adds more vector functions.

Echo
1F616EMO

In-game notification system

Interactive Item API
Jose_ManuelS18

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

flinv
Luke

API to add new inventory tabs which work across different inventory mods

Position listeners library
karamel

Players' position observing library

node entity queue
fluxionary

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

Player Settings
1F616EMO

Player-specific settings

SmartFS
rubenwardy

A library to allow mods to make Formspecs, a form of GUI, easily.

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

Timed World Modifiers library
karamel

Environmental ABM that could be triggered on a very wide range of nodes but only a few at a time.

Chatcommand Library
LMD

Library for registering chatcommands.

Discrete Player API
Hypernoot

A library for games which attaches players to node grid

Flow Extras
lazerbeak12345

An experimental collection of extra widget APIs for flow

Quest Framework
TeTpaAka

Simple framework to define quests.

Wield Events
mt-mods

Events for wield item switching

Natural Entities
nurd3

A lightweight API for spawning random entities

Key Binding
1F616EMO

Register callbacks when a key is pressed, holded, or released.

Function Delayer
Hybrid Dog

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

Nametags2
Logikí

Allow objects had nametags with observers, colors and range

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

Mapsync
BuckarooBanzai

Synchronize the ingame map with a lua-backend

Smart Chat
Clyde

A new, lightweight, simple and modular Chatsystem

Advanced Rangefinder
sorcerykid

Extends the Minetest API with search capabilities for entities

Sway
lazerbeak12345

A simple inventory that makes use of Flow forms.

CSMT Bots (Obsolete)
Logikí

Add bots to your game for training

Phonics Library
Neuromancer

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