Asuna
EmptyStar

A vibrant world of natural wonders

XaEnvironment
AiTechEye

A game that aims to contain lots of environments and things.

Ethereal NG
TenPlus1

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

Cool Trees
runs

It adds some cute trees.

Wilhelmines Living Floatlands
Liil

Adds various prehistoric animals to your Floatland Zone, if you are using V7 Map Generator.

Wilhelmines Natural Biomes
Liil

Adds 9 new biomes

Wilhelmines Living Jungle
Liil

Adds a new type of dense jungle biome to your world

Wilhelmines Living Desert
Liil

Adds plants to the default deserts of minetest game.

Technic Plus Beta
mt-mods

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

More Ores
Calinou

Adds new ore types.

Advanced Biome Decoration API
EmptyStar

An API for creating advanced, complex biome decorations

Luamap
MisterE

An easy-to-use api for lua mapgens that takes the pain out of mapgen coding. Focus on mapgen logic, not on voxelmanipulation.

Plantlife
mt-mods

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

Wilhelmines Marinara
Liil

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

Native Villages
Liil

Adds villages of native people to the world.

Livingcaves
Liil

Adds more life to the caves of your world

Randungeon
Phii

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

Amethyst
alerikaisattera

Amethyst, basalt, calcite and related building blocks

Geodes Library
alerikaisattera

API/library for creating geodes