Nether
PilzAdam

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

Loria (alpha)
siegment

Survival in hardcore acid-alien sci-fi themed world

Draconis
ElCeejo

Adds terrifying Dragons and powerful equipment.

Trucraft
mt-mods

An alternative crafting system done entirely in the world.

Hades Revisited
Wuzzy

You have stranded on the planet Hades. Use your limited supplies to survive and use terraforming to create a beautiful habitable place. (EARLY TEST VERSION)

Ocean
StarNinjas

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

Kitty/Kitto Ores
nemokitty9

Nemokitty9's own ore pack. Includes Tools!

Multiple Biome Generator
chaosomnium

230 Pseudorandomly Generated Biomes, Trees, Fruits, Ores, Tools, and Liquids

Native Villages
Liil

Adds villages of native people to the world.

NodeCore Lignite
Winter94

Adds Lignite, an ore of coal. Now outdated, please use NodeCore Coal instead. See Below.

Alien Material
debiankaios

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

Sticks Stones
MikeRedwood

Makes Sticks from leaves and scatters small stones

Underground Challenge
Hypernoot

Explore all 62 underground biomes!

Grave
ElCeejo

Adds an eerie biome with multiple mobs.

Alive AI
AiTechEye

Advanced survivor ai mobs (npc, monsters and more)