K Color Blocks
ketwaroo

Adds specific stainable blocks for building stuff in creative mode. Comes with a rainbow wand for applying the tints.

Prefab Redo
cheapie

Cheapie's version of Dan's old prefab mod, which adds pre-fabricated concrete elements: catwalks, benches, ladders, railings...

My Flooring
Don

A basic set of flooring

Steel bar blocks
atum785

adds blocks made of steel bars (xpanes)

Glostone Building Blocks
Wovado

Adds basic glostone-based building materials

Better Ice
TheFanne

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

Bouncy Mushrooms
AirplaneMan

Adds Bouncy Mushrooms to MT

Combine Slabs
X-DE

Allows you combine slabs

Columnia
mt-mods

Adds simple pillars and columns

Japanese Signs
saradaabura

This will add signs that support Japanese to the game (Mineclonia).

Base Craft
Jenny1611

BaseCraft adds essential, high-quality building blocks like concrete slabs and stairs to complete your constructions with consistency and style

My Hole In The Wall
Don

Decorative blocks for around gardens and more

My Stone Paths
Don

Stone paths

Pillars
citorva

Add a lot of pillars for fun.

X Clay
SaKeL

Adds hardened clay.

Node houses
MatyasP

Node houses is a mod by MatyasP that adds one-node block of houses, for crafting using items from mode default.

Place Rotated
12Me21

Better slab/log placement

Quartz New
alerikaisattera

Quartz and quartz glass building blocks

Kotatsu Tables
Piezo_

Adds a new piece of furniture based on Japanese kotatsu tables

New bricks
DimonPy

adds 119 new bricks and grinder

Rainbow Source
Shara

Adds coloured water.

My Paint Wood
Don

Paint wood

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.

WorldEdit Wall Block
SkyBuilder1717

Adds block and item for making big structures easily as possible.

Ethereal: All-faces tree blocks
1F616EMO

All-faces tree block for Ethereal trees

Colored Sand
LoneSurvivr

Adds dyed variants for the default sand.

Better Roads
DragonWrangler

allows players to make roads with less jagged edges

Pizzas and cakes - pack 1
MatyasP

add some pizzas and cakes to 'pizzas'

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.

Colorable banisters
MatyasP

add support for colorable banisters and banisters with repeating nodebox

digicolor
fluxionary

node whose color can be set via digilines

Digilines Lightstone
1F616EMO

Digiline-controlled light-emitting colour blocks

Tac Nayn
GreenXenith

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

Sundial
The4spaceconstants

Mostly game-independent sundial

Palisade
SFENCE

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

Alien Tools
chaosomnium

Adds Alien Tool, Shield, biome, etc.

Color Cubes
Wuzzy

This mod contains several colorful abstract blocks for decoration.

New Horizons
Hi_World

Adds 4 new biomes and TONS of new blocks!

My Chisel
Don

A chisel that allows you to shape blocks.

CreNodes
gtzi203

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