Aquamarine
RasPiManiac

Adds Aquamarine ore, ingots, etc.

Tac Nayn
GreenXenith

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

Glass
AntumDeluge

Enhances default glass to make it colorable.

Minetest Emotions
ResendeTech

Adds new feelings in the form of blocks

Kotatsu Tables
Piezo_

Adds a new piece of furniture based on Japanese kotatsu tables

Legendary Ore
DynamaxPikachu

Adds legendary ore and blocks

Mycorners
Don

Put decorative corners on blocks.

Ethereal: All-faces tree blocks
1F616EMO

All-faces tree block for Ethereal trees

NodeCore Nature: Revised
Warr1024

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

Place Rotated
12Me21

Better slab/log placement

Plasterwork
Sokomine

Add colored plaster coats to nodes

Falling Stairs
lazerbeak12345

Adds falling stairs and slabs for gravel, sand and others.

Autobuilder
limafresh

Adds a GUI for building cubes with customizable width, height, and length.

Plastic Box
Starbeamrainbowlabs

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

Letters
Amaz

Adds a letter cutting tool with letter "signlike" nodes.

Barrier
erov

Barriers with optional placement restrictions.

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.

Glostone Building Blocks
Wovado

Adds basic glostone-based building materials

My Mulch
Don

Turns leaves and other items to mulch blocks

Tinted Glass
1F616EMO

Colored glass

NodeCore Vuga
Winter94

Generates Vuga Underground.

silence
fluxionary

adds a node to silence nearby sounds

Pole Scaffolding
SFENCE

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

nodeu
ulla

metal blocks stair railing coloured

Archaeology
SkyBuilder1717

Adds an looting and API in archaeologing

Colored Stone
Clyde

provides colored stones.

8Segmentdisplayblocks
unacceptium_core

8 segment digital display as blocks

Ehlphabet
1F616EMO

Letter blocks

NodeCore Additional Content
Winter94

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

Prismatic Stone
doomburger

Adds decorative prismatic stone blocks, coral dyes, and six new crafting recipes.

Fire Braziers
Excalibur Zero

Fire braziers that cause flames to erupt one node above them that don't fade right away when are near flames or are punched.

Useful Contraptions
theFox

Some useful contraptions / machines.

Palisade
SFENCE

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

Instabreak
Mint

Instantly break (most) construction blocks.

Fraktur (alphabet digits letters)
shaft

Adds a whole set of Fraktur type metals in the form of nodes.

Better Fences (1F616EMO Redo)
1F616EMO

Allow fences to connect to all nodes

Colored Sand
LoneSurvivr

Adds dyed variants for the default sand.

Colored Strings
Alib234

Adds colored strings and allows to create wool from 4 strings and viceversa

Nameznik
MatyasP

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

Item Replicator
ApolloX

Replicate items with ease.