Quilt Mods for Minecraft Java
Browse 501 free Quilt mods for Minecraft Java — popular picks include Nether 3.0, Piglin Conservatory v3.0, Myriad.
Step by step: How to install Minecraft Java mods & modpacks
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Nether 3.0
A light datapack which alters Nether generation to make it more interesting to traverse by modifying existing biomes.
Piglin Conservatory v3.0
Adds a news structure to the Nether, The Piglin Conservatory, along with a new Obsidian Apple, Dragon Fruit, Toxic Mushrooms, Hoglins' Fossils, Corrupted Emerald and a New Music Discs!
Myriad
Enhance your vanilla Minecraft experience with a myriad of new features.
Revamped Floating Islands
Datapack that creates Floating Island worlds based on the old preset, with all biomes and structures. Additionally featuring floating oceans and rivers.
MC Calamity
A datapack that attempts to recreate the Terraria: Calamity Mod
No More Ocean Monuments
Removes ocean monuments from the world generation.
Talentium
Talentium adds 13 dynamic talents with a configurable level curve and level cap. 60+ advancements, tons of new content and lots of exploration.
Warm Island
Tropical islands: Pirate themed worldgen!
RPGTitles
Small, cosmetic datapack that adds titles to small things in the game! See the dimension name when you switch dimension, see the current biome you are in and maybe get something when you kill a powerful foe..
I want it earlier (Mounts of Mayhem, IWIE)
This Minecraft Mod adds things from the Minecraft Live before Mojang publishes them in a snapshot! Or just backport the new stuff..

Alex's Caves: Refabricated
An unofficial Fabric port of 'Alex's Caves' - Explore five new rare cave biomes hidden under the surface of the Overworld...
Basic Skyblock
Just the bare minimum for vanilla skyblock. Automatically removes newely generated chunks.
TuffBlocks
Adds tuff blocks from 1.21 to older versions.
Rick's Portal Gun [Fabric/Quilt]
Adds the portal gun from Rick and Morty
The Copperier Age: Copperier Copper
Expends and enhances the theme of The Copper Age drop. New blocks and mechanics, many tweaks, and awesome optional retextures!
No More Portals
A simple mod to prevent players from going through nether portals
Featurify - WorldGen Control
A worldgen configuration mod that eliminates the need for datapacks. Add, disable, replace any feature, replace, disable any biome with another biome.
Heart of the Machine
A whole new dimension of abandoned machinery to explore
Wayfinder
A new Immersive exploration mob that takes you to your desired biome! This mob creates a more lore & balanced way of finding biomes and offers tons of customization to tailor to player experience!
Instant Feedback
Implements the most requested features from feedback.minecraft.net

Spectre
Improvements (or not) to Phantoms! Reworked Mechanics, new items, and more!
Seed Guard
Protects your world seed by altering feature and structure placement, preventing seed cracking.
Pepsi's Pocket Dimension
Your very own pocket dimension/island.
FlatEdit+
A rework of the horrific superflat creation screen.
Spontaneous-Replace
Provide players with enhanced vanilla adventures with new content

Vaulted End
Serverside Polymer mod that replaces Elytra item frames with Vaults on End Ships

Fast Surface
A vanilla worldgen optimization mod to optimise block calculations during surface builder
Polymer Patch for Friends&Foes
A Polymer Patch mod for Friends&Foes, allowing it to work fully server side!
Any Dimension Mod 2
Create dimensions out of any block! This mod adds 400+ dimensions to the game, one for each of the possible blocks.
Voidblock: Mod Version
The original Skyblock has been modernized and updated to the latest versions of Minecraft...

World Manager
Create and manage worlds in-game, through commands. An improved Multiverse alternative for Fabric.
Nether Descent
A nether biome mod by the Potion Studios team, truly an adventure like no other awaits you with new biomes, mobs, blocks, items and more!
TLOTD
Explore the ancient times, when dinosaurs ruled the earth, dig deep into the earth to find more valuables or adventure into the unknown depths of space! The sky is the limit!
Dimensional Item Cannons
When moving items in 3 dimensions isn't enough.
Just Beta Nether
Reverts the Nether completely to its original form!
Hollow
A mod about hollow logs and hollow promises