Mobs Redo
TenPlus1

Adds a mob api for mods to add animals or monsters etc.

Water Life
Gundul

new mobs for your river and sea water

Mobkit
Termos

Entity API

Elepower
IcyDiamond

A powerful modpack

Display Modpack
Pyrollo

Display modpack provides mods with dynamic display (signs, clocks, steles) and api to manage font and display

Handle Schematics
Sokomine

A library to make creating and placing saved areas easier

mod utilities
theFox

Providing some utilities that can be used by other mods.

Documentation System
Wuzzy

A simple in-game documentation system which enables mods to add help entries based on templates.

Common Mob Interface
Byakuren

A standard modding interface for interacting with mobs

Tubelib2
joe7575

A library for mods which need connecting tubes / pipes / cables or similar.

Mana
Wuzzy

Adds a mana attribute to players, can be used as energy source for magical items, etc.

ts_workshop
Thomas-S

API for workshops

Fluid Container API
IcyDiamond

Library for nodes containing fluids

Gunslinger
ANAND

[alpha] Ranged weapons API that allows mods to create realistic and enjoyable guns.

Meshport (Minetest Mesh Exporter)
random_geek

Easily export areas in Minetest to meshes for 3D rendering.

Player Physics API
Wuzzy

This makes it possible for multiple mods to modify player physics (speed, jumping strength, gravity) without conflict.

Moblib
LMD

Low-level high-performance entity library

Weapons API
Stix

Adds an API to easily register custom weapons

Pillars
citorva

Add a lot of pillars for fun.

Guidebook Library
PolySaken

A library for registering functional in-game documentation 'guidebooks'.

More vector helpers
Hybrid Dog

Adds more vector functions.

Light Tool
Extex

Adds a tool and api that creates beams of light

SmartFS
rubenwardy

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

Melterns
IcyDiamond

Tinkers Construct in Minetest!

Streetlights API Modpack
Linuxdirk

This modpack combines the Streetlights API and the two reference implementation mods.

Zero-Effort Custom Minerals
Piezo_

A tool for registering entire materials, complete with ore generation, tool-sets and automatically generated sprites with almost no effort required

Climate API
TestificateMods

A powerful engine for weather presets and visual effects. Requires a weather pack like Regional Weather.

Journal
theFox

Do you want to add story to your game? Make your protagonist write notes into his Journal.

Fireworks Redo
niwla23

Adds some better looking fireworks

Armor Monoid
Byakuren

A player_monoids monoid for armor

Find Biome
Wuzzy

Add commands to list and find biomes

Fire Plus
Lone_Wolf

Makes fire, lava and other flaming nodes a little more dangerous

Jean's Economy
Jean3219

Full Economy for Servers like, paying, individual bank statemants, daily rewards, easy api for modders, easy integration with other mods ...

QA-Block
bell07

A mods development / QA helper

Mesecons Stealthnode
Clyde

Register your own Ghoststones.

Trucraft
PolySaken

An alternative crafting system done entirely in the world.

Select Item
Wuzzy

Allows other mods to add a simple form to choose a single item.

Minetest Systemd (API)
Piezo_

Debugging utility and compatibility tools for server owners and/or modpack creators

Basic HUD textures
Wuzzy

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

Biome Info API
Wuzzy

Simple API to get data about biomes.