Rainbow Source
Shara

Adds coloured water.

Falls
Just_Visiting

A Particle-based Waterfalls/Lavafalls Mod

Lapis Lazuli
LNJ

Adds lapis lazuli ore, items and blocks.

Stained Glass
andersje

Adds various stained glass blocks, originally by doyousketch2

My Press
Don

A press to flatten steel

Maple tree
Duvalon

Adds a maple tree placed during world generation.

Safe Chest
Atlante

Add a safe chest with secret password

My Paths
Don

Dirt paths.

Stairs and slabs of wool
X-DE

Stairs and slabs of wool

My Stone Paths
Don

Stone paths

Pink Lava
TenPlus1

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

Embedded Lights
scr267

Decorative block embedded LED or Potlights

WorldEdit Wall Block
SkyBuilder1717

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

Tinted Glass
1F616EMO

Colored glass

X Clay
SaKeL

Adds hardened clay.

Gates (wider)
Sokomine

Wide gates for easy walking through and keeping cattle inside

My Ladders
Don

Adds different ladders to Luanti

Plaster
Extex

Adds a variety of Plaster blocks for building.

ColoredCement
Truemmerer

Add Cement Blocks with unifieddyes support

Bunker Block
Spooks

Add blast proof concrete and its craft items.

Stoneworks
TumeniNodes

Stoneworks simply adds some fun, and cool building options to Minetest.

Prefab Redo
cheapie

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

Kotatsu Tables
Piezo_

Adds a new piece of furniture based on Japanese kotatsu tables

My Flooring
Don

A basic set of flooring

Cozy Lights
SingleDigitIq

Early alpha. Improves the way light sources(torches etc) behave and allows to create huge lights, literal projectors with just a mouse click, light map will be computed for you.

My Cobble
Don

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

Better Ice
TheFanne

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

Colored Blocks
sermow

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

New Horizons
Hi_World

Adds 4 new biomes and TONS of new blocks!

Floating Anchor
Starbeamrainbowlabs

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

Aquamarine
RasPiManiac

Adds Aquamarine ore, ingots, etc.

Parcdeco
Floatland

adds grass-like nodes that have flowers

Blox
mt-mods

Adds lots of differently colored and textured blocks to Minetest.

My Mesh Nodes
Don

A machine that makes different shape node

Saphire
Ryft77

Adds saphire stuff

Digilines Lightstone
1F616EMO

Digiline-controlled light-emitting colour blocks

Steel bar blocks
sotha1

adds blocks made of steel bars (xpanes)

My Bricks
Don

Machine to make bricks out of common material

Legendary Ore
DynamaxPikachu

Adds legendary ore and blocks

Ethereal: All-faces tree blocks
1F616EMO

All-faces tree block for Ethereal trees