Glostone Building Blocks
Wovado

Adds basic glostone-based building materials

Gates (wider)
Sokomine

Wide gates for easy walking through and keeping cattle inside

CreNodes
gtzi203

Adds useful nodes for the creative mode, like barriers or light nodes.

My Paths
Don

Dirt paths.

Ethereal Mosses
1F616EMO

More mosses for dirt types in Ethereal NG

NodeCore Pottery
Winter94

Adds clay and ceramic items and nodes to NodeCore

Alien Tools
chaosomnium

Adds Alien Tool, Shield, biome, etc.

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.

Archaeology
SkyBuilder1717

Adds an looting and API in archaeologing

Stoneworks
TumeniNodes

Stoneworks simply adds some fun, and cool building options.

NodeCore Additional Content
Winter94

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

Tinted Glass
1F616EMO

Colored glass

8Segmentdisplayblocks
unacceptium_core

8 segment digital display as blocks

New bricks
DimonPy

adds 119 new bricks and grinder

TerraContent Base Library
AirplaneMan

Preferably use with it's dependents! Base Content/Library for my Minetest Game mods based on a certain 2D Sandbox Game

My Paint Extras
Don

Allows you to paint dirt, gravel, wood, trees and more.

Ocular Networks
mt-mods

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

Plastic Box
Starbeamrainbowlabs

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

Pink Lava
TenPlus1

Adds pink lava to certain depth of map with new mahogany obsidian block

Plasterwork
Sokomine

Add colored plaster coats to nodes

Rainbow Source
Shara

Adds coloured water.

awuuwa's Building Blocks
awuuwa

various building blocks

X Clay
SaKeL

Adds hardened clay.

Better Roads
DragonWrangler

allows players to make roads with less jagged edges

NodeCore Beacons
Warr1024

Long-distance navigation beacons for NodeCore

Global Bulletin Boards
FaceDeer

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

My Paint Wood
Don

Paint wood

My Parkour
Don

Nodes for making a parkour track

Color Blocks
mt-mods

Contains colored building blocks.

Better Fences (1F616EMO Redo)
1F616EMO

Allow fences to connect to all nodes

Tac Nayn
GreenXenith

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

My Siding
Don

Adds lines on one side of block to make it look like siding

Steel bar blocks
atum785

adds blocks made of steel bars (xpanes)

Mycorners
Don

Put decorative corners on blocks.

Color Cubes
Wuzzy

This mod contains several colorful abstract blocks for decoration.

Parcdeco
Floatland

adds grass-like nodes that have flowers

Better Ice
TheFanne

Modifies ice so that it melts into water when broken, and will be melted by torches

NodeCore PumMINE
Winter94

Mineable pumice

Exile Roof Ridge Tiles
Oz

Adds a dedicated roof ridge tile for Exile builds.

Node roads
MatyasP

Add much of one-node roads and crossroads, road bridges and slopes