Batmod
Don

Fun mod that is about bats

Ocular Networks
mt-mods

Draw power from the world, and use it to power machines and tools.

Chest2
ApolloX

The Advanced Chest

Hidestone
shaft

Adds a stone that can hide up to 100 blocks.

Voxelizer
LMD

Turns 3D models into astonishing voxel builds.

Plastic Box
Starbeamrainbowlabs

Adds a recolourable plastic box. Fork of @cheapie's version with improvements.

aw_edificiosdecuba_habana
JALdMIC

It has some buildings based on those in Havana

Key Combos
epCode

A lib for adding actions when certain keys are pressed in order.

Touch
Skamiz Kazzarch

Orient yourself in the darkness by touch.

Nodecore Fairy Chimneys
Winter94

Adds geological formations called 'hoodoos' or 'fairy chimneys' to your worlds.

Oddly Sized Checkerboard Testnodes 2
erle

Adds oddly sized checkerboard test nodes.

Trading
ROllerozxa

Trade items with other players.

Mese Stuff for Minetest Classic
Ludus

Don’t Mese around with ordinary materials!

Think Block
Thebinoman

This block can think random thoughts.

NodeCore Lignite
Winter94

Adds Lignite, an ore of coal. Now outdated, please use NodeCore Coal instead. See Below.

Dirt Tunneler
Neuromancer

Makes dirt deeper and you can tunnel through it just by walking through it. Press spacebar/shift to tunnel upward/downward with auto placed ladders.

Sundial
The4spaceconstants

Mostly game-independent sundial

RandomTP
Bapt-tech

creates /rtp command and allow you to create your owns random teleport places

Interactive Item API
Jose_ManuelS18

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

Chat Anticurse
lag01

Kick player out when they type a curse word in chat or using /me or /msg command.

Valentine's day
Luke

Adds valentine cards

Personal Bookmarks
AntumDeluge

Allows players to create a limited number of personal bookmarks to where they can teleport.

Minetest HTTP API QoS control queue
SX

Improve quality of important HTTP requests by grouping requests into service quality buckets.

Omni Tool
ApolloX

3 tools in 1

Under Sky
Shara

Skybox switch for really dark Minetest caves

Smart Vector Table
Noodlemire

API that adds a way to create tables indexed by 3D Vectors.

Horadric cube
Xevin

An artifact that can transmute items

Super Axe
adrian-castravete

An automatically wood chopping axe.

Respawn Timer
LMD

Forces players to wait a set duration before respawning

Cave explorer tool
SFENCE

Cave explorer tool to use acoustic signals for undergound exploring.

Mid Measure
ANAND

Quickly get the distance between two nodes and calculate their mid-point

Sticks Stones
MikeRedwood

Makes Sticks from leaves and scatters small stones

Gettime
1F616EMO

A api to get in-game hour/minute

Shortcut
Derevio

Adds the ability to set shortcuts to commands.

Glostone Building Blocks
Wovado

Adds basic glostone-based building materials

resurrection cross
GigaByte

add resurrection cross

Pencil Redo
1F616EMO

Tool to edit infotext of nodes

titou nicknames
titou4

manage visibility of nicknames of players

Cornet
dagm

Torture players with a cornet!!

Guider
1F616EMO

HUD markers for navigation