Fake Solids
Holly Mae

Creates fake blocks that can be walked through.

nodeu
ulla

metal blocks stair railing coloured

My Mulch
Don

Turns leaves and other items to mulch blocks

Instabreak
Mint

Instantly break (most) construction blocks.

ColoredCement
Truemmerer

Add Cement Blocks with unifieddyes support

Global Bulletin Boards
FaceDeer

Allows creation of global bulletin boards where players can post public messages

Minetest Emotions
ResendeTech

Adds new feelings in the form of blocks

Palisade
SFENCE

Add craftable palisades in many styles. Hades Revisited is supported.

NodeCore Additional Content
Winter94

Ask and Ye Shall Recieve (Multiple Small Additions Requested in NC Documentation )

My Blueprint
Don

Easy way to layout your build

Kotatsu Tables
Piezo_

Adds a new piece of furniture based on Japanese kotatsu tables

Simple Models
AntumDeluge

Very simple models.

Mycorners
Don

Put decorative corners on blocks.

Place Rotated
12Me21

Better slab/log placement

More Mese Post Lights!
1F616EMO

Add more mese post light

Sundial
The4spaceconstants

Mostly game-independent sundial

NodeCore Nature: Revised
Warr1024

Updated, fixed, enhanced edition of Winter94's NodeCore Nature

Zughy32 colored blocks
MisterE

Plain colored blocks from the Zughy 32 palette.

Nodecore Stucco
Avicennia_g

Adds a few decorative building nodes to Nodecore through simple and crude masonry.

Barrier
erov

Barriers with optional placement restrictions.

Cube Nodes
Andrey01

Adds colorful blocks with various symbols as letters, digits, punctuation, emoji and special signs.

Weedstone Random Mod Thing
chaosomnium

Originally meant to be a simple electronics type mod inspired by redstones, I messed around with the code after getting bored and got this weird mod, and now it's this thing. Enjoy I guess?

Directions
1F616EMO

Lines laying on the ground to guide directions

Pole Scaffolding
SFENCE

Craftable pole scaffoldings. Support default game and Hades Revisited game.

Ocular Networks
mt-mods

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

Tinted Glass
1F616EMO

Colored glass

Template to Easily Make Fancy Voxelized Models
Noodlemire

Provides voxelmodel.obj, a model designed to be shaped by changing its texture, in order to easily create fancy voxelized models.

8Segmentdisplayblocks
unacceptium_core

8 segment digital display as blocks

NodeCore Vuga
Winter94

Generates Vuga Underground.

awuuwa's Building Blocks
awuuwa

various building blocks

Beds for Minetest Classic
MyNameIsKid

Beds for Minetest Classic by MyNameIsKid.

Archaeology
SkyBuilder1717

Adds an looting and API in archaeologing

Ehlphabet
1F616EMO

Letter blocks

Better Roads
DragonWrangler

allows players to make roads with less jagged edges

New bricks
DimonPy

adds 119 new bricks and grinder

Aquamarine
RasPiManiac

Adds Aquamarine ore, ingots, etc.

Tac Nayn
GreenXenith

Adds Nyan Cat's evil twin, Tac Nayn (and a gray-scale rainbow).

Colored Sand
LoneSurvivr

Adds dyed variants for the default sand.

DragonEggLock
mi.sh

You can lock a Dragon Egg so it doesnt teleport away

Nameznik
MatyasP

Námezník / Fouling point marker, place where ends wide between tracks enough. For first, czech design.