Minecraft Java 1.21 Mods
Browse 22,226 free mods for Minecraft Java 1.21 — popular picks include Ombre de Bushy, Experience Bar Health Indicator, TntIgnite.
Step by step: How to install Minecraft Java mods & modpacks
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Ombre de Bushy
Grows a danger zone that slowly kills players
Experience Bar Health Indicator
This mod utilizes the Minecraft experience bar & level text, to display the HP of entities that you are looking at (toggleable).
TntIgnite
Make tnt explode without any hints
Unbreakable AnvilsX
Minecraft, but anvils are unbreakable. Just install the plugin and you're ready to go—no configuration required.
Hide Downgrade Warning
Hides "Downgrading a world is not supported" warning when opening worlds saved in newer version of Minecraft

The Pandoras Box
Pandoras Box adds a mysterious block that periodically generates random items from every installed mod. + New dimension
Tradable Soul Speed
This datapack lets you buy the Soul Speed enchantment.
TotemBurst
Some effects on screen and a Sound effect for destroying a Totem of Undying or Unaliving someone
StarNav:Celestial Navigation
Realistic hardcore world navigation

AdvancedReports
Reports made simple. AdvancedReports adds a clean native Paper dialog system for player reports, giving staff a fast way to review issues and take action.
skLambda
Skript addon that adds lambda functions and listeners to Skript.
snapcam
Placeable camera for Minecraft fabric 1.21.1 — enter its view, shoot handheld, or use the self-timer. No commands, no custom keybinds. Inspired by the Education Cam.
One Block To End All One Blocks
Quest-driven one block survival for Fabric 1.21.4. Break your block, earn drops, complete quests, advance through 6 phases. Multiplayer-ready with team islands and bridge merging. Requires Fabric API.
Fell
A lightweight, highly configurable, Tree Felling mod.
Armor Warn
Alarms you by triggering a two-stage alarm: the first at 25% total armor, and the second at 10%
Hotter Mania
Mod updates savannas, deserts and badlands
Enderman Look Guard
Prevents accidental Enderman aggro by gently nudging your camera away before eye contact happens. Configurable distance, sensitivity, and optional HUD indicator. Client-side, Fabric, Mod Menu support.
SMPEnhanced+
A comprehensive plugin built for survival multiplayer servers that want fine-grained control over combat balance, limits, and quality-of-life improvements which are all configurable in-game.
Disable Trial Spawners
This datapack enables players to temporarily disable trial spawners!
Vault Item Exchange
Minecraft Paper plugin that allows you to exchange config-set items for money using Vault (prices also set in the config).
CaveCrawlers
A feature-rich Minecraft plugin for custom items, shops, mining, and more.
Cold Torch
The Cold Torch is a decorative iron torch that emits no actual light level or heat. It possesses a chilling aura that instantly freezes nearby water into ice and applies a slowness effect to any mobs
mineable end portal frame
with silk touch you can mine the end portal frame
Carpet-YBS-Addition
This is an expansion mod for Carpet that offers useful or useless features for YBS Server.
Friends 2 Config
This Project adds new items, Commands, Playtime_limiter and more things.
Spawner Overhaul
Overhaul spawners by making them unbreakable, requiring a specific cursed enchantment to break them.
Fair-DanTiao
A companion plugin for DanTiao

Trilife
This mod gives all players three lives. Loose all and you're gone.
EpicJoinMessages
EpicJoinMessages is a customizable Minecraft plugin that shows unique join and leave messages with sounds, effects, and GUI selection for each player.
ObsidianTNT
Adds Obsidian TNT which allows you to blow up bedrock
Simple Advancements
Not game changing - just get a few additional, fun achievements in your game!
logAuth
Make your server safe with logAuth - the innovative authentication plugin!
Chat Input API
A plugin for PaperMC to get inputs from chat.

Mining Progress
This plugins allows you to see mining progress.
Lifesteal Retake
A lifesteal datapack for your SMP!
BlockPlacerBreakerFeaturePatch
A patch to Block Breaker & Block Placer adding small tweaks I think are important