Better Biomes by Atlante
Neuromancer

This mod adds some of the subtle understated beauty of nature to your biomes to make the world look more natural. It was created by Atlante.

Easy ores
X-DE

Minetest ores now generate higher up

Geodes
AwesomeDragon97

Adds amethyst geodes and an API for making custom geodes.

Alien Material
debiankaios

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

3d ores!
Soundwavez

a slick new take on the default ores!

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

Loose Rocks
eduardomezencio

Adds loose rocks which generate randomly on the surface.

Sedimentology
sofar

A mod that adds realistic erosion and degradation of rocks.

Kitty/Kitto Ores
nemokitty9

Nemokitty9's own ore pack. Includes Tools!

Coconut Trees
AwesomeDragon97

Adds coconut trees that appear on beaches

Zinc
alerikaisattera

Zinc metal, used for making brass

Swamps
Hybrid Dog

Adds swamps

Sailing
cakenggt

Live in a tropical paradise where you can sail, mine coconuts, etc.

Meze
Calinou

A special ore that kills you when mined.

Boring RPG
Lebedev

New items blocks and other pieces are waiting for you here

Dyes for Extra Biomes
Skivling

Deprecated because after ebiomes v1.5.0, dye recipes are included by default, making this unnecessary. Adds dye recipes for the flowers from Extra Biomes.

Grave
ElCeejo

Adds an eerie biome with multiple mobs.

Giant Mushroom/ Mushrooms
Hybrid Dog

Add mushrooms and giant mushrooms.

XNether
Ghaydn

Adds trees, grass and ores to PilzAdam's Nether

summer
ulla

SUMMER

Bamboo
AwesomeDragon97

Adds bamboo which generates in jungles and can be used as a crafting ingredient.

Ancient Bones
karlexceed

Adds bones with loot to dungeons.

Desert Ores
DumbDave961

Generates ores in deserts and other biomes. Also spawns raw ore blocks if enabled. Biome specific ore node variants coming soon.

Underground Challenge
Hypernoot

Explore all 62 underground biomes!

Winuser Leafdecay
Liil

With this additiona leaf decay, all trees in naturalbiomes, livingdesert, livingjungle and livingfloatlands have a working leafdecay function.

Generic moon of Saturn
Red_King_Cyclops

Replaces the default earthlike setting with a generic moon of Saturn.

Startest
Robot10&Scheletor

This mod adds several space stuff to the game.

My Treasure
Don

Adds treasure chests around the world

Quartz Geodes
AwesomeDragon97

Extends the Geodes mod with quartz geodes.

Unstable Caves
M BLOC

Some stones may cave in if punched, making underground expeditions more risky.

A Cute Flower
lml55

Adds an innocent flower with some head armor

Magma
SuperStarSonic

Adds volcanoes, lava vents and new magma blocks

Tac Nayn
GreenXenith

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

Lapis Lazuli
LNJ

Adds lapis lazuli ore, items and blocks.

Dragonbone Stuff
Robot10&Scheletor

Adds dragonbone set

Ancient Ice Stuff
Robot10&Scheletor

Adds a new powerful ore to the game

Randomized Map-specific Ores
Piezo_

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

Alien Tools
chaosomnium

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

Archaeology
SkyBuilder1717

Adds an looting and API in archaeologing

New Biomes
Arkatron

If you like underground biomes, this thing is for you.