Too many ores
TeufloV

This adds 53 new ores. But most of them are useless.

Noriel Sylvire's Minerals Core Mod
Noriel_Sylvire

An API for automatically registering recipes, nodes and ore generation.

Technic Plus Beta
mt-mods

The technic modpack extends the Minetest game with many new elements, mainly constructable machines and tools.

Epic Combat
hilol

Fight your enemies with various weapons and protect yourself with distinct sets of Armour, whilst sharpening your skills in PVP and PVE.

KSurvive 2
MadKamel

A game built 100% from scratch, including code, textures and sounds.

Alien Tools
chaosomnium

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

Kitty/Kitto Ores
nemokitty9

Nemokitty9's own ore pack. Includes Tools!

Multiple Biome Generator
chaosomnium

230 Pseudorandomly Generated Biomes, Trees, Fruits, Ores, Tools, and Liquids

Alien Material
debiankaios

Adds new blocks, items, and tools from aliens. A new time begins.

Cloud Items
Panquesito7

Powerful cloud tools.

Loria (alpha)
siegment

Survival in hardcore acid-alien sci-fi themed world

Technic Plus
mt-mods

Technic fork with focus on features and stability

Draconis
ElCeejo

Adds terrifying Dragons and powerful equipment.

Randomized Map-specific Ores
Piezo_

Adds two randomly created ores to each world with varying properties depending on the world's seed

Zero-Effort Custom Minerals
Piezo_

A tool for registering entire materials, complete with ore generation, tool-sets and automatically generated sprites with almost no effort required

Obdy
Sires

Adds some pretty OP tools :)

Melterns
IcyDiamond

Tinkers Construct in Minetest!

Caverealms Lite
Shara

A mod for Minetest to add underground realms.

Ethereal NG
TenPlus1

Ethereal mod uses the v7 mapgen to add many new biomes to the world.

Technic
RealBadAngel

Extensive machinery mod with electricity and ores.