Geodes
AwesomeDragon97

Adds amethyst geodes and an API for making custom geodes.

Magma Conduits
FaceDeer

Removes default mapgen lava and adds widely-spaced vertical lava "veins".

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

block physics
GigaByte

Add pieces of broken blocks when breaking them.

Sedimentology
sofar

A mod that adds realistic erosion and degradation of rocks.

Swamps
Hybrid Dog

Adds swamps

Loose Rocks
eduardomezencio

Adds loose rocks which generate randomly on the surface.

Sailing
cakenggt

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

Coconut Trees
AwesomeDragon97

Adds coconut trees that appear on beaches

Zinc
alerikaisattera

Zinc metal, used for making brass

Meze
Calinou

A special ore that kills you when mined.

Grave
ElCeejo

Adds an eerie biome with multiple mobs.

Boring RPG
Lebedev

New items blocks and other pieces are waiting for you here

Giant Mushroom/ Mushrooms
Hybrid Dog

Add mushrooms and giant mushrooms.

XNether
Ghaydn

Adds trees, grass and ores to PilzAdam's Nether

Wilhelmines Living Desert
Liil

Adds plants to the default deserts of minetest game.

Alien Tools
chaosomnium

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

Desert Ores
DumbDave961

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

Herbs
Clyde

Adds 15 flowers and 6 mushrooms.

Underground Challenge
Hume2

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.

Bamboo
AwesomeDragon97

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

Time Travel
Red_King_Cyclops

Adds in a craftable time machine that can be used to time travel to different time periods of Earth's history.

summer
ulla

SUMMER

Wildflower Fields
mzs.112000

Adds a wildflower field biome to Minetest Game.

Easy ores
X-DE

Minetest ores now generate higher up

Quartz Geodes
AwesomeDragon97

Extends the Geodes mod with quartz geodes.

Valleys Mapgen
Gaël de Sailly

A map generator with valleys, rivers, mountains and many plants.

Ancient Bones
karlexceed

Adds bones with loot to dungeons.

New Biomes
Arkatron

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

Magma
SuperStarSonic

Adds volcanoes, lava vents and new magma blocks

My Treasure
Don

Adds treasure chests around the world

Generic moon of Saturn
Red_King_Cyclops

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

Kitty/Kitto Ores
nemokitty9

Nemokitty9's own ore pack. Includes Tools!

Beautiful Boulders
regulus

Procedurally Generated Rocks with (pretty) Accurate Collision Boxes

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).

Ancient Ice Stuff
Robot10&Scheletor

Adds a new powerful ore to the game

Advanced Biome Decoration Modpack
EmptyStar

A collection of advanced biome decorations