New Biomes
Arkatron

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

Tac Nayn
GreenXenith

Adds Nyan Cat's evil twin, Tac Nayn (and a gray-scale rainbow).

Beautiful Boulders
regulus

Procedurally Generated Rocks with (pretty) Accurate Collision Boxes

Kitty/Kitto Ores
nemokitty9

Nemokitty9's own ore pack. Includes Tools!

NodeCore Crystals
Winter94

Adds various crystal types to Nodecore

Obdy
Sires

Adds some pretty OP tools :)

NodeCore Fungi
Winter94

Adds various fungi to NodeCore, in all their mycelial glory.

NodeCore Pottery
Winter94

Adds clay and ceramic items and nodes to NodeCore

NodeCore Coal
Winter94

Adds 3 ores of coal to NodeCore.

NodeCore SkyRealm
Warr1024

SkyBlocks inside vanilla NodeCore

Randomized Map-specific Ores
Piezo_

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

Hades Endgame
VeproGames

Adds various goodies to Hades Revisited, focused on Late/Endgame

New Horizons
Hi_World

Adds 4 new biomes and TONS of new blocks!

Fragments
Amaz

A mapgen with a goal, with things needed to advance to the next level.

Nyancat's heaven (reworked)
Hybrid Dog

Adds a nyanland in the sky

World Borders
argyle

Add impenetrable barriers to the sides and bottom of the world.

Fix floating sands!
1F616EMO

Avoid hanging sands and gravels

Boulders
Neuromancer

Adds pushable boulders which spawn in dirt & stone. They tumble when they wind up on top of each other and cause damage when they fall on you.

Noriel Sylvire's Minerals Core Modpack
Noriel_Sylvire

An API for automatically registering recipes, nodes and ore generation.

NodeCore Quicksilver
Winter94

Experiment with quicksilver to discover it's various properties!

Easter Eggs / Ostereier
Ineva

Adds various coloured eggs for Easter!

More Coral
Nathan.S

Adds coral in more colors.

Nodecore Vulcan Improved
Winter94

Improved version of nc_vulcan.

NodeCore Fossil
Winter94

Discover fossils, oil, natural gas, amber, and more!

NodeCore Nature: Revised
Warr1024

Updated, fixed, enhanced edition of Winter94's NodeCore Nature

Boulder Dig
Neuromancer

Creates gameplay for the game Boulder Dig (inspired by Boulder Dash). Find the boulders and gems scattered throughout the regularly generated world. 2nd option is more densely packed levels.

Fly-B-Gone!
Hugues Ross

Hides butterflies/fireflies

Trucraft
mt-mods

An alternative crafting system done entirely in the world.

Underground Survival Lighting
Arkatron

If you like underground light in survival, use this mod, it can help that.

NodeCore Vuga
Winter94

Generates Vuga Underground.

Sticks Stones
MikeRedwood

Makes Sticks from leaves and scatters small stones

Nodecore Fairy Chimneys
Winter94

Adds geological formations called 'hoodoos' or 'fairy chimneys' to your worlds.

golden lava
GigaByte

add golden lava

Purple ore
X-DE

Adds new purple ore to floating islands and caves from height 200 to 31000.

NodeCore Stalactites & Stalagmites
Winter94

Generates Stalactites and Stalagmites in caverns underground.

Spawn redo
cathaya7d4

Drop-in replacement for default/spawn for more third-party biomes

NodeCore CatRealm
Warr1024

Adds a cat-themed dimension with unique ores and over-powered tools

Euthamia
Avicennia_g

Grassy Goldenrod plant for Nodecore

treasures
ademant

Treasure nodes with useful items

Nodeternal Darkness
Kimapr

make nodecore very dark