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.

Badlands
AwesomeDragon97

Adds the badlands biome, which contains plentiful clay and gold.

block physics
Giga_M

Add pieces of broken blocks when breaking them.

Magma Conduits
FaceDeer

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

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.

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

NextGen Bedrock
StarNinjas

Adds an indestructible bedrock layer at the bottom of the world.

Zinc
alerikaisattera

Zinc metal, used for making brass

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

Sailing
cakenggt

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

Loose Rocks
eduardomezencio

Adds loose rocks which generate randomly on the surface.

Swamps
Hybrid Dog

Adds swamps

Grave
ElCeejo

Adds an eerie biome with multiple mobs.

Meze
Calinou

A special ore that kills you when mined.

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

Bamboo
AwesomeDragon97

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

Herbs
Clyde

Adds 15 flowers and 6 mushrooms.

Desert Ores
DumbDave961

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

Winuser Leafdecay
Liil

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

Valleys Mapgen
Gaël de Sailly

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

summer
ulla

SUMMER

Underground Challenge
Hypernoot

Explore all 62 underground biomes!

Generic moon of Saturn
Red_King_Cyclops

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

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.

Ancient Ice Stuff
Robot10&Scheletor

Adds a new powerful ore to the game

A Cute Flower
lml55

Adds an innocent flower with some head armor

Magma
SuperStarSonic

Adds volcanoes, lava vents and new magma blocks

Wildflower Fields
mzs.112000

Adds a wildflower field biome to Minetest Game.

Ancient Bones
karlexceed

Adds bones with loot to dungeons.

New Horizons
Hi_World

Adds 4 new biomes and TONS of new blocks!

Randomized Map-specific Ores
Piezo_

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

Startest
Robot10&Scheletor

This mod adds several space stuff to the game.

Dragonbone Stuff
Robot10&Scheletor

Adds dragonbone set

Alien Tools
chaosomnium

Adds Alien Tool, Shield, biome, etc.

Beautiful Boulders
regulus

Procedurally Generated Rocks with (pretty) Accurate Collision Boxes