BigNum
ThePython10110

A library that adds a data type for arbitrary precision integers

Position listeners library
karamel

Players' position observing library

Random API
TheFanne

Provides a simple-to-use framework for selecting random objects with probabilities

Local Time and Date Api
Bob64

Provides an API for other mods to use to get a user's preferred date and time format/time zone based on their configured settings

More vector helpers
Hybrid Dog

Adds more vector functions.

B.W Protection
Logikí

This gives API for bad words detection

IntelligenceFramework
PlamiumAI

Provide an AI RNN API for developers.

Be2een Api
_gianpy_

timers, animation and action! ciack

Subcommands
1F616EMO

API to make commands with subcommands

Newspaper
1F616EMO

A Customizable newspaper

Basic HUD textures
Wuzzy

Adds basic but neccessary HUD images: Heart icon, bubble icon, … (for game authors)

Ambience API
1F616EMO

API for playing background musics

SSCSM implementation
Luke

A server-sent CSM library.

World Storage [deprecated]
Sumi

[DEPRECATED] Allows saving and loading data to the world folder, and offers an alternative to global settings

Player Info [deprecated]
Sumi

[DEPRECATED] Adds a way to track information about the player and controls.

Benchmark Engine
theFox

Engine for running benchmarks ingame.

Emerald Bank (MineClonia)
N Freeman

Keep your Emeralds in a Bank, a complete economy API

default sounds for other games
awuuwa

mods that only depend on "default" for sounds, can be made to use this mod to source the sounds from

World Data Manager Library
AntumDeluge

A library for managing data files in the world directory.

Oreveins
ApolloX

A node which produces ores

Minetest Object IDs (API)
zeuner

Persistent object-IDs for developers

Metavectors
theFox

vectors using metatables to make coding easier

Walkover
lordfingle

A library to make it easier for developers to detect on_walk_over

Lambda
benrob0329

Atomic lambda string-parser for Lua.