Aquamarine
RasPiManiac

Adds Aquamarine ore, ingots, etc.

Rainbow Source
Shara

Adds coloured water.

Cube Nodes
Andrey01

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

My Paint Extras
Don

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

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.

My Paths
Don

Dirt paths.

Prefab Redo
cheapie

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

My Wood Slopes
Don

Make slopes with wood blocks.

Lapis Lazuli
LNJ

Adds lapis lazuli ore, items and blocks.

My Workshop
Don

Workshop benches

Better Locks
SkyBuilder1717

Adds locks and locked doors

Embedded Lights
scr267

Decorative block embedded LED or Potlights

Gates (wider)
Sokomine

Wide gates for easy walking through and keeping cattle inside

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 Flooring
Don

A basic set of flooring

More Ladders
SkyBuilder1717

Adds more ladders and sticks!!!

Digilines Lightstone
1F616EMO

Digiline-controlled light-emitting colour blocks

Columnia
mt-mods

Adds simple pillars and columns

My Ladders
Don

Adds different ladders to Luanti

Mycorners
Don

Put decorative corners on blocks.

Plasterwork
Sokomine

Add colored plaster coats to nodes

My Default Fences
Don

Adds more default fences

Parcdeco
Floatland

adds grass-like nodes that have flowers

Zughy32 colored blocks
MisterE

Plain colored blocks from the Zughy 32 palette.

Tables
AwesomeDragon97

A simple mod that adds decorative wooden 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.

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.

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?

Tac Nayn
GreenXenith

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

Useful Contraptions
theFox

Some useful contraptions / machines.