Colored Blocks
sermow

Different colors of: stone, stone bricks, wood obsidian, and glass

Ethereal: All-faces tree blocks
1F616EMO

All-faces tree block for Ethereal trees

My Stone Paths
Don

Stone paths

Better Roads
DragonWrangler

allows players to make roads with less jagged edges

Colored Sand
LoneSurvivr

Adds dyed variants for the default sand.

My Fences
Don

Adds nice looking fences.

Prefab Redo
cheapie

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

My Ores
Don

Adds ores and minerals to Luanti

Unifiedbricks
wowiamdiamonds

This mod allows the user to re-color default bricks using Unified Dyes, and provides some pattern variations as well.

Lapis Lazuli
LNJ

Adds lapis lazuli ore, items and blocks.

Gates (wider)
Sokomine

Wide gates for easy walking through and keeping cattle inside

Tinted Glass
1F616EMO

Colored glass

My Default Glass
Don

Glass made from many default items

Safe Chest
Atlante

Add a safe chest with secret password

My Press
Don

A press to flatten steel

ColoredCement
Truemmerer

Add Cement Blocks with unifieddyes support

My Paths
Don

Dirt paths.

My Wood Slopes
Don

Make slopes with wood blocks.

My Flooring
Don

A basic set of flooring

More Ladders
SkyBuilder1717

Adds more ladders and sticks!!!

Node houses
MatyasP

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

Ethereal Mosses
1F616EMO

More mosses for dirt types in Ethereal NG

My Ladders
Don

Adds different ladders to Luanti

My Workshop
Don

Workshop benches

Mycorners
Don

Put decorative corners on blocks.

Alien Tools
chaosomnium

Alien Tools Mod for Minetest - adds Alien Tool, Shield, biome, etc

Plasterwork
Sokomine

Add colored plaster coats to nodes

My Default Fences
Don

Adds more default fences

Embedded Lights
scr267

Decorative block embedded LED or Potlights

Zughy32 colored blocks
MisterE

Plain colored blocks from the Zughy 32 palette.

Quartz New
alerikaisattera

Quartz and quartz glass building blocks

Tables
AwesomeDragon97

A simple mod that adds decorative wooden tables.

Kotatsu Tables
Piezo_

Adds a new piece of furniture based on Japanese kotatsu tables

nodeu
ulla

metal blocks stair railing coloured

My Default Lights
Don

Simple lights made from default material

Archaeology
SkyBuilder1717

Adds an looting and API in archaeologing

Floating Anchor
Starbeamrainbowlabs

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

Columnia
mt-mods

Adds simple pillars and columns

Better Ice
TheFanne

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

Dyeable Steel Blocks
nemokitty9

Allows Players to dye Steel for decorative blocks.