Ethereal NG
TenPlus1

Adds many new biomes, items and mechanics into the world.

Everness
SaKeL

Adds many new biomes, items and blocks.

Nether
PilzAdam

Adds a deep underground realm with different mapgen that you can reach with obsidian portals.

Plantlife
mt-mods

Adds various kinds of plants, fruit bushes, fallen trees, and a whole host of foliage and other ground cover.

More Ores
Calinou

Adds new ore types.

Villages
Sokomine

Explore the world and find villages of diffrent types. Buy a house in a village and settle down.

Extra Biomes
CowboyLv

Adds extra biomes, while keeping its looks close to the vanilla MTG

Technic
RealBadAngel

Extensive machinery mod with electricity and ores.

Dwarf Fortress style caverns
FaceDeer

Adds vast underground caverns in the style of Dwarf Fortress, complete with underground flora in diverse biomes.

pathv7 redo! (Mapgen V7 only)
1F616EMO

Creates a worldwide network of paths, bridges and tunnels.

Melterns
IcyDiamond

Create unique tools from different materials!

Caverealms Lite
Shara

Adds underground realms.

Dungeons Plus
EmptyStar

Decorates dungeon rooms with unique layouts and features

Beautiful Flowers
1faco

Adds many flowers to MT

Swamp Biome
Atlante

This mod adds a new swamp biome, with mangrove trees, mud and more!

Pyramids (with treasures)
Wuzzy

Pyramids with treasures!

Other Worlds
TenPlus1

Adds asteroid layers and height-based skybox switches to create space environments.

Technic Plus
mt-mods

Technic fork with focus on features and stability

Wilhelmines Living Jungle
mt-mods

Adds a new type of dense jungle biome to your world

Mob Biome Mapper
Neuromancer

Allows mobs to spawn in biomes that don't support them.

Nether
Hybrid Dog

The underworld.

Industrious
StarNinjas

Adds new industrious-themed blocks and tools.

Natural slopes for Minetest Game
karamel

Add natural slopes for Minetest Game

the curse of the corngirl
Soundwavez

adds a creepy cornfield, with a dark secret...

Alive AI
AiTechEye

Advanced survivor ai mobs (npc, monsters and more)

More Structures
ClothierEdward

Adds several new structures to make your world more alive.

Wilhelmines Natural Biomes
Liil

Adds 9 new biomes

Ocean
StarNinjas

Adds coral reefs, fish, decorative ocean blocks and much more!

Randungeon
Phii

adds highly randomized vivid dungeons to the world, and tools to spawn/customize them.

Australia
demon_boy

Adds a wide variety of Australia-themed biomes and content

Baked Clay
TenPlus1

Adds the ability to bake clay into blocks and colour them with dye.

Algae
Just_Visiting

Algae mapgen addition to "Minetest Game"

Wilhelmines Marinara
mt-mods

adds water structures and coral reefs to the oceans of your world

Native Villages
Liil

Adds villages of native people to the world.

Giant Mushroom/ Mushrooms
Hybrid Dog

Add mushrooms and giant mushrooms.

Rail Corridors + Treasures
Wuzzy

Adds simple underground mines with railways and occasional treasure chests.

Natural Habitat
Mish7913

Adds more Plants and Biomes to the game.

Shipwrecks
mt-mods

A simple mod that adds various shipwrecks with treasures into the ocean

Technic Plus Beta
mt-mods

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

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.