Neoforge Mods for Minecraft Java
Browse 1,881 free Neoforge mods for Minecraft Java — popular picks include Aerodynamics4MC, OpenPortals, Iron's Spells HUD .
Step by step: How to install Minecraft Java mods & modpacks
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Aerodynamics4MC
A mod that adds realistic aerodynamics & wind to Minecraft
OpenPortals
A simple-to-use library for implementing custom dimension portals.
Iron's Spells HUD
Client-side addon for Iron's Spells & Spellbooks, allowing to get mana values using NBT for HUD mods

Past-el Palettes
Bringing back classic colors as dyes
JDA Library
JDA Mod so mods can easily get access to using JDA without needing to do shenanigans such as JarInJar

Placeholder API NeoForge
Unofficial NeoForge port of Patbox's Text Placeholder API
NoUpgradeNetherite
Remove of Necessity or Upgrade In Netherite Craftings in Minecraft Java!
Shaderite
NeoForge library to help modders with shader usage
HapticCraft
HapticCraft makes that you can fill haptic feedbacks with bHaptics TactSuit devices in Minecraft
Jump Enchantment
New enchantment that, when applied to boots, increases your jump height!
Formula Loader
Load Json to Formula for modders and datapack users.
FilloaxLib
A kotlin library for utility and cross-loader features for Filloax's mods.

Genflower
World gen & loot utils library for datapacks and mods.
GunsmithLib Standard Ammo Library
Add ammo variants to TaCZ's default weapons.
ReadStar
A mod adds configurable and more realistic stars.
KubeJS CSV
Add CSV parse/read/write support for KubeJS
Transport-Lib
A simple library allowing modders to create custom pipe networks
CypherCore
The Core Mod for the Modpack Creatorio: Supply Chain
TFC Pot Rule Breaker
A lightweight prerequisite patch that relaxes TerraFirmaCraft pot and Firmalife vat recipe input rules.
Three-D Particle
Immerse yourself in Minecraft like never before with breathtaking 3D particles
Psi Tweaks
Overpowered patches to Psi.
Hot Swap
Automatically Swaps To The Best Weapon/Tool
Hextech Lib
Just like in a roguelike game, upon completing a certain objective, you can choose one of three buffs to empower yourself.
Baubles 2
Adding a new touch of bling to Minecraft.
ZoomerLibrary
LibZoomer unofficial architectury port. A library that allows other mods to create zooms and custom spyglasses easily.
PMW Plus
PMW Plus adds helpful new systems to Protomanly's Weather
FLib-Unofficial port
An unofficial port to 1.21.1 for the FLib mod; will remain until the original creator Lothrazar hasn't finished porting
Thunderbolt_lib
A runtime bridge library and addon API for AE2 Lightning Tech, providing lightning energy capability interfaces, recipe builders, and plugin loading support for addon mods.
Create OBB Collision Crash Fix
Fixes a server crash in Create 6.0.10 caused by a NullPointerException in contraption collision code (ContinuousOBBCollider.collideMany).

IXApi
This mod added a good lib to minecraft

Fubric API
Fubric API lowers your fps :D
Duck Core
Library for my mods.
Lazr's Lib Ported
A ported library containing utilities for ported Lazr's Mods.
Scala3Std
Universal Minecraft ModLoader Scala 3 Runtime Provider
Configured Burn Time
Allows to configure the items fuel time dynamically in a data-driven way
Create: Echoes Core
Core mod for the modpack Create : Echoes of the Great Derailment