My Default Glass
Don

Glass made from many default items

My Slopes
Don

MySlopes

X Clay
SaKeL

Adds hardened clay.

Aquamarine
RasPiManiac

Adds Aquamarine ore, ingots, etc.

Node houses
MatyasP

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

My Default Lights
Don

Simple lights made from default material

My Paths
Don

Dirt paths.

My Wood Slopes
Don

Make slopes with wood blocks.

Plasterwork
Sokomine

Add colored plaster coats to nodes

My Press
Don

A press to flatten steel

Ghost Block
Blocky Player

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

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).

Parcdeco
Floatland

adds grass-like nodes that have flowers

More Snow
Sokomine

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

WorldEdit Wall Block
SkyBuilder1717

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

Zughy32 colored blocks
MisterE

Plain colored blocks from the Zughy 32 palette.

Tables
AwesomeDragon97

A simple mod that adds decorative wooden tables.

Gates (wider)
Sokomine

Wide gates for easy walking through and keeping cattle inside

Archaeology
SkyBuilder1717

Adds an looting and API in archaeologing

Colored Blocks
sermow

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

My Cobble
Don

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

Roadway
X17

Adds simple roads in 4 sizes.

Useful Contraptions
theFox

Some useful contraptions / machines.

My Mesh Nodes
Don

A machine that makes different shape node

My Paint Extras
Don

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

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

Prefab Redo
cheapie

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

More Ladders
SkyBuilder1717

Adds more ladders and sticks!!!

Pink Lava
TenPlus1

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

Blox
mt-mods

Adds lots of differently colored and textured blocks to Minetest.

My Default Fences
Don

Adds more default fences

My Ladders
Don

Adds different ladders to Luanti

More Mese Post Lights!
1F616EMO

Add more mese post light

Rainbow Source
Shara

Adds coloured water.

Node roads
MatyasP

Add much of one-node roads and crossroads, road bridges and slopes

Stack Slabs
TumeniNodes

stackable slabs for Minetest

Mycorners
Don

Put decorative corners on blocks.

Legendary Ore
DynamaxPikachu

Adds legendary ore and blocks