NextGen Bedrock
StarNinjas

Adds an indestructible bedrock layer at the bottom of the world.

Magma Conduits
FaceDeer

Removes default mapgen lava and adds widely-spaced vertical lava "veins".

TP Stairway
joe7575

Simple stairways and bridges for your buildings and machines

Banners
Anonymous_moose

Adds decorative banners in all colours of wool.

Transporter
mt-mods

Adds a configurable technic-based transporter, with bookmarks and many options

Simple streetlight spawner
mt-mods

Adds various streetlight "spawners" (5m tall, supports multiple pole materials and light sources)

Bucket lite
daret

Bucket - fork of Minetest Game mod with reduced "bucket" liquid flowing

MTC Chisel
Can202

Add Chisel and new decorative blocks.

Astralcraft
EmptyStar

Adds shooting stars and and related items to Luanti worlds

Doors without window
Taras Lavrentiev

Adds doors and trapdoors without windows to Minetest Game

Geodes
AwesomeDragon97

Adds amethyst geodes and an API for making custom geodes.

Quarry Mechanics
kestral

Adds quarry mechanics to stone nodes.

Wet Mud
Nicu

Hydrates farmland without using water directly

Gems Battle
MisterE

Bedwars-like team battle minigame

Moonflower
TenPlus1

Moon Flower, when touched by the moon, it opens up a casting light.

Alien Material
debiankaios

Adds new blocks, items, and tools from aliens. A new time begins.

Fantasy Biomes
AirplaneMan

Fantastical Biomes for your worlds.

XBlocks
GamingAssociation39

Additional blocks for decoration/building

Mylandscaping
Nathan.S

Lets you put up decorative walls around your gardens, and make pretty hardscapes.

Christmas Tree
ExeterDad

Adds a decorated indoor Christmas tree with wrapped gifts.

ts_doors
Thomas-S

Adds doors for all kinds of wood.

Modern Ish
thomasthespacefox

A collection of modern-ish odds and ends.

Portable Chests
Bob64

Portable chests you can pick up even when there are items inside.

Ephesus
Horka

Added ancient architectural blocks from the Mediterranean

Minetest 2D
AiTechEye

Transforms the world into 2 dimensions

My Scaffolding
Don

Scaffolding to help you reach high places

More Stones
Blocky Player

Provides a variety of educational and decorative minerals and rocks.

Oxidizing Copper
StarNinjas

This mod aims to make copper/bronze more realistic by making them slowly oxidize into a bluish/green block when exposed to water.

Chains
X17

Adds chains to climb or decorate

Armor Toggle
Luffy0805

Enable and disable the visibility of the armor (3D Armor) using chat commands.

Turret
Giga_M

adds a defensive turret

Underground Challenge
Hypernoot

Explore all 62 underground biomes!

Cones: Traffic and Training Cones
ClassicAdam

Cones. Various use traffic cones and training cones. 3 sizes, 10 colors, 30 cones in total.

Sedimentology
sofar

A mod that adds realistic erosion and degradation of rocks.

Procedural Furniture
the_raven_262

Creates furniture collections

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

Bricks Plus
X17

Adds different brick patterns

Colored Blocks
sermow

Different colors of: stone, stone bricks, wood obsidian, and glass

Nether Mobs
Dirkfried

Add monsters and dragons to your nether world.

Dirtcraft
dayer4b

Adds automatic crafting recipes for making most kinds of dirt