Chatcommand Library
LMD

Library for registering chatcommands.

Kill Log
Wuzzy

Allows mods to display the recent player kills, deaths and other game events

Quest Framework
TeTpaAka

Simple framework to define quests.

Item Holders
Jose_ManuelS18

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

More Triggers
SkyBuilder1717

Adds more triggers for Awards

Grenades API
LandarVargan

Adds an API for easily creating grenades

Unified Stamina API
TestificateMods

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

LCD Font
Nazalassa

A simple font for font_api

Job Control Mod
sorcerykid

A more flexible alternative to the builtin minetest.after function

Player Visibility Api
erov

Easily manage player visibility in a similar way to area protection

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.

Simple Models
AntumDeluge

Very simple models.

TPH's Basic Filesystem
TPH

API for loading files into a basic readable format as well as loading and converting conf files

ReSpec
ZenonSeth

Easy and Versatile Formspec Creation based on ConstraintLayout

Interactive Item API
Jose_ManuelS18

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

NodeCore Staybs API
Winter94

Movement parameters for various 'staybs'

Library Mount
Panquesito7

API Framework for mounting objects.

Lockout
ApolloX

Late-stage Security for Servers

Advanced Breath and Health APIS
liteninglazer

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

Doclib
joe7575

A library to generate ingame manuals based on markdown files.

Object UUIDs
Silver Sandstone

Assigns a persistent UUID to every object.

NucleoTest
DarkXWolf17

Battle Royale-like game. Provides an API and a reference implementation. Highly radioactive. Work in progress.

AFK Indicator
1F616EMO

API to check player AFK status

Key Binding
1F616EMO

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

Noriel Sylvire's Minerals Core Modpack
Noriel_Sylvire

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

Tasks Framework
AntumDeluge

Framework for adding tasks & quests.

SmartFS
rubenwardy

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

DataMiner
sorcerykid

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

Level API
Hypernoot

A library for games to load levels defined as schematics

Japanese Name
Logikí

transform your player name to japaNESE (joke)

Nametags2
Logikí

Allow objects had nametags with observers, colors and range

Wield Events
mt-mods

Events for wield item switching

flinv
Luke

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

Entity Control Function Library
Noodlemire

Adds functions to override and unregister entities.

Signs Redux
sorcerykid

Signs Redux is a complete rewrite of default signs that adds many new features

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.

Isogen
BuckarooBanzai

Generate isometric images from ingame builds

Lush
rstcxk

fully featured shell interpreter

YAML Config File Library
snowyu

Load or Save YAML config file

CSMT Bots (Obsolete)
Logikí

Add bots to your game for training