WorldEdit Wall Block
SkyBuilder1717

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

Subway Tracksides
GWLT

Add tracksides for your subway map.

Livetools
AiTechEye

Craft tools which have a life of their own - they can fight, dig, or place for you

My Torches
Don

Changes default torches to ones that burn out and cause damage

bridgemaker
mike.monkeybiter

A refillable machine to easily create simple block bridges across caverns and valleys.

My Default Fences
Don

Adds more default fences

monster_api_gb
GigaByte

add an api to create bosses

Technic Grass Clean
1F616EMO

A tool like chainsaw, but cut grass, not tree.

Blox
mt-mods

Adds lots of differently colored and textured blocks to Minetest.

Sugar
X17

Adds eatable sugar made of papyrus and a sugar block

Uncrafter
JoeEnderman

Adds an uncrafting table

void grenade
GigaByte

add an void grenade

Tac Nayn
GreenXenith

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

More Mese Post Lights!
1F616EMO

Add more mese post light

ColoredCement
Truemmerer

Add Cement Blocks with unifieddyes support

Node houses
MatyasP

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

Spectator Mode
jp

A mod for Minetest allowing you to watch other players in their 3rd person view.

Nyancat's heaven (reworked)
Hybrid Dog

Adds a nyanland in the sky

Mesecons Stealthnodes
Clyde

Register your own Ghoststones.

BitChange
Krock

Money items for your world. You can mine bitcoins. Sort of.

Glostone Building Blocks
Wovado

Adds basic glostone-based building materials

Engravings
Taren

Adds multiple engraved blocks and benches to make them.

Kitty/Kitto Ores
nemokitty9

Nemokitty9's own ore pack. Includes Tools!

Trucraft
mt-mods

An alternative crafting system done entirely in the world.

Time Stone
j45

This mod adds 2 single use stones, a day stone and a night stone, the day stone turns time to sunrise and the night stone turns time to sunset.

Bows
AiTechEye

A easy bow mod with arrows

Coins
Clyde

Adds 3 kind of Coins to your game

Lava + Water > Stone
1F616EMO

Cool Lava into technically special stones for easier cleanup

Maple tree
Duvalon

Adds a maple tree placed during world generation.

Frames
opfromthestart

Frames from Technic since it was removed.

faction items
GigaByte

add some items to be used as prizes for special events or player achievements

Magic Tech
Futuray-pgm

It adds technology based magic

Random (Useful) stuff
pl608

A library that adds well... Random Stuff

Surprise Blocks
Wuzzy

Randomly spawns surprise blocks closely about ground level.

Openion Yeast
Wovado

Adds Yeast and a Yeast Barrel

LW Wires
mt-mods

Wires and bundle cables.

Saphire
Ryft77

Adds saphire stuff

X Clay
SaKeL

Adds hardened clay.

Prefab Redo
cheapie

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

Atium
GenesisMT

A strange a ore with tools.