Rainbow Source
Shara

Adds coloured water.

My Wood Slopes
Don

Make slopes with wood blocks.

More Snow
Sokomine

snow and wool for stairs - nicer winter landscape and snow-covered roofs

Stoneworks
TumeniNodes

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

Gates (wider)
Sokomine

Wide gates for easy walking through and keeping cattle inside

Ghost Block
Blocky Player

Adds blocks that you can walk through. Build traps, hidden rooms and more!

My Mulch
Don

Turns leaves and other items to mulch blocks

My Mason Hammer
Don

A hammer to make stairs, ladders and footholds

Abritorch
mt-mods

multicolored torches

More Mese Post Lights!
1F616EMO

Add more mese post light

Aquamarine
RasPiManiac

Adds Aquamarine ore, ingots, etc.

Blox
mt-mods

Adds lots of differently colored and textured blocks to Minetest.

My Press
Don

A press to flatten steel

Useful Contraptions
theFox

Some useful contraptions / machines.

Pillars
citorva

Add a lot of pillars for fun.

My Ladders
Don

Adds different ladders to Luanti

My Default Lights
Don

Simple lights made from default material

Columnia
mt-mods

Adds simple pillars and columns

My Stone Paths
Don

Stone paths

More Ladders
SkyBuilder1717

Adds more ladders and sticks!!!

Color Blocks
mt-mods

Contains colored building blocks.

Better Roads
DragonWrangler

allows players to make roads with less jagged edges

Prefab Redo
cheapie

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

Archaeology
SkyBuilder1717

Adds an looting and API in archaeologing

Alien Tools
chaosomnium

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

Tile Floors
ClassicAdam

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

Better Ice
TheFanne

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

Maple tree
Duvalon

Adds a maple tree placed during world generation.

Plasterwork
Sokomine

Add colored plaster coats to nodes

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.

Stack Slabs
TumeniNodes

stackable slabs for Minetest

Weedstone Random Mod Thing
chaosomnium

Originally meant to be a simple electronics type mod inspired by redstones, I messed around with the code after getting bored and got this weird mod, and now it's this thing. Enjoy I guess?

Legendary Ore
DynamaxPikachu

Adds legendary ore and blocks

Tac Nayn
GreenXenith

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

Saphire
Ryft77

Adds saphire stuff

Parcdeco
Floatland

adds grass-like nodes that have flowers

Pink Lava
TenPlus1

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

Hardcorebrix
drkwv

Adds durable building materials that won't break on a first dig.

WorldEdit Wall Block
SkyBuilder1717

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