Colored Blocks
sermow

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

Gates (wider)
Sokomine

Wide gates for easy walking through and keeping cattle inside

Alien Tools
chaosomnium

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

Cement
Linuxdirk

A craftable and “makeable“ cement blocks for Minetest Game

Archaeology
SkyBuilder1717

Adds an looting and API in archaeologing

Parcdeco
Floatland

adds grass-like nodes that have flowers

Embedded Lights
scr267

Decorative block embedded LED or Potlights

My Default Lights
Don

Simple lights made from default material

ColoredCement
Truemmerer

Add Cement Blocks with unifieddyes support

Columnia
mt-mods

Adds simple pillars and columns

My Default Glass
Don

Glass made from many default items

Useful Contraptions
theFox

Some useful contraptions / machines.

Floating Anchor
Starbeamrainbowlabs

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

WorldEdit Wall Block
SkyBuilder1717

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

nodeu
ulla

metal blocks stair railing coloured

My Wood Slopes
Don

Make slopes with wood blocks.

Zughy32 colored blocks
MisterE

Plain colored blocks from the Zughy 32 palette.

My Mesh Nodes
Don

A machine that makes different shape node

My Default Fences
Don

Adds more default fences

Blox
mt-mods

Adds lots of differently colored and textured blocks to Minetest.

More Ladders
SkyBuilder1717

Adds more ladders and sticks!!!

Better Roads
DragonWrangler

allows players to make roads with less jagged edges

My Siding
Don

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

My Bricks
Don

Machine to make bricks out of common material

Better Locks
SkyBuilder1717

Adds locks and locked doors

Mycorners
Don

Put decorative corners on blocks.

Prefab Redo
cheapie

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

Tables
AwesomeDragon97

A simple mod that adds decorative wooden tables.

Rotting Wood
Polynium

Causes wood to slowly rot while exposed to water

My Paint Extras
Don

Allows you to paint dirt, gravel, wood, trees and more.

Saphire
Ryft77

Adds saphire stuff

New Horizons
Hi_World

Adds 4 new biomes and TONS of new blocks!

Tac Nayn
GreenXenith

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

My Cobble
Don

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

My Ladders
Don

Adds different ladders to Luanti

More Mese Post Lights!
1F616EMO

Add more mese post light

My Mulch
Don

Turns leaves and other items to mulch blocks

Legendary Ore
DynamaxPikachu

Adds legendary ore and blocks

Stack Slabs
TumeniNodes

stackable slabs for Minetest

Drawstruct
Xenon

Draw or generate random structures