Floating Anchor
Starbeamrainbowlabs

ExtraUtilities' Angel Block for Minecraft in Luanti! Place structures in mid-air with ease.

My Wool
Don

More wool colors

Ethereal: All-faces tree blocks
1F616EMO

All-faces tree block for Ethereal trees

My Pipes
Don

Mechanical pipes

Pink Lava
TenPlus1

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

Gates (wider)
Sokomine

Wide gates for easy walking through and keeping cattle inside

Autobuilder
limafresh

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

TerraContent Crimson
AirplaneMan

Introduces the Crimson to your worlds.

ColoredCement
Truemmerer

Add Cement Blocks with unifieddyes support

Better Roads
DragonWrangler

allows players to make roads with less jagged edges

Stoneworks
TumeniNodes

Stoneworks simply adds some fun, and cool building options.

My Dye
Don

More dye colors

Ethereal Mosses
1F616EMO

More mosses for dirt types in Ethereal NG

My Paint Wood
Don

Paint wood

Roadway
X17

Adds simple roads in 4 sizes.

New Horizons
Hi_World

Adds 4 new biomes and TONS of new blocks!

Pillars
citorva

Add a lot of pillars for fun.

My Paths
Don

Dirt paths.

Lapis Lazuli
LNJ

Adds lapis lazuli ore, items and blocks.

Colored Sand
LoneSurvivr

Adds dyed variants for the default sand.

Cube Nodes
Andrey01

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

Parcdeco
Floatland

adds grass-like nodes that have flowers

Glostone Building Blocks
Wovado

Adds basic glostone-based building materials

Zughy32 colored blocks
MisterE

Plain colored blocks from the Zughy 32 palette.

Explosion proof obsidian
Miner34

Adds an explosion proof obsidian.

Legendary Ore
DynamaxPikachu

Adds legendary ore and blocks

Useful Contraptions
theFox

Some useful contraptions / machines.

My Default Lights
Don

Simple lights made from default material

My Cobble
Don

This is a simple mod that lets you turn cobble into gravel and gravel into sand

Tac Nayn
GreenXenith

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

Tables
AwesomeDragon97

A simple mod that adds decorative wooden tables.

My Parkour
Don

Nodes for making a parkour track

Colored Steel
cd2

Adds colored steel blocks.

More Ladders
SkyBuilder1717

Adds more ladders and sticks!!!

Tile Floors
ClassicAdam

Various colors of tile flooring in 16px and 256px res

My Siding
Don

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

Saphire
Ryft77

Adds saphire stuff

My Flooring
Don

A basic set of flooring

My Wood Slopes
Don

Make slopes with wood blocks.

Kotatsu Tables
Piezo_

Adds a new piece of furniture based on Japanese kotatsu tables