Minecraft Java 1.21 Mods
Browse 1,228 free mods for Minecraft Java 1.21 — popular picks include Analog Redstone Lamp, Piston Command, Tree Capitator Enchantment.
Updated daily
Analog Redstone Lamp
Lets redstone lamps emit variable light levels based on redstone power strength.
Piston Command
Push block entities like on Bedrock and make pistons work the way you want with tags
Tree Capitator Enchantment
An intelligent, modpack-friendly tree-felling enchantment. Break one log and the whole real tree falls — while your builds and Create contraptions stay untouched. Server-side, chunk-safe, tag-based, works with vanilla & modded trees. NeoForge 1.21.1.
JsComputer
This mod adds a programmable in‑game computer featuring a simulated shell and a built‑in JavaScript interpreter.
ORNGstone Torches
New redstone torch looks, with the same ol' classic redstone feel.
Mines wither storm
Adds the Wither Storm from Minecraft: Story Mode and new powerful items. Polish alpha version of the mod!
Pepsi's Brew Queue
Program your brewing stand to brew full potion runs automatically.
ᴇconomyCraft
A lightweight Minecraft mod that adds a chest-based economy system with player shops, passive income, and redstone-enabled payment signs.
Advanced Redstone Blocks
Various QoL texture tweaks for redstone-related blocks
Excitingly Explosive
Adds more Explosives to the game.
Fiber-Optic Cables
Adds a fiber optic cable, used to instantaneously transfer multiple redstone signals within a one block space.

Whitestone Mod
Added "Whitestone" electric system similar to Redstone, but removed the delay, and let the signal can transform vertically. And added a few bugs! Note: Developer misspell 'transmitter' into 'transformer'. This bug is already fixed in 0.3.0.
Holographique Map
MapMinecraft (NeoForge 1.21.1) adds the Live Map Projector: a block that scans nearby terrain and projects a floating 3D voxel hologram of the world. Features real textures, biome colors, water, a config GUI, and a redstone entity radar.
Redstone Additions
Adds breeders, block breaker, conveyors, block placers, and more !!! Vanilla friendly
Feufollet's alarm
A mod that adds an loud emergency alarm when powerd by redstone.
红石生电冒险优化[Redstone Power Adventure Optimization]
融合了多种优质模组与资源包,让玩家更容易上手mc,另外增加了红石生电优化,增加其实用性,以及游玩体验.(It integrates multiple high-quality mods and resource packs, making it easier for players to get started with MC. Additionally, it has optimized the generation of redstone electricity, enhancing it)
TC VeinGlow PC
An advanced vein mining mod with radial menu, RGB-customizable block outline highlighter, custom mining shapes, and a skill system for harvesting, tree-felling, and liquid handling.
Simple, Informative Redstone
Simpler textures for redstone, while providing valuable information.
Redstone Compass
Edits the compass to look more like a radar made of redstone.
Annoyance Be Gone
Makes those annoying mob and Redstone sounds go away!
Redstone Torch Random Tick
Redstone Torch Random Tick makes burnt out redstone torches be reactived by random ticks, similar to older minecraft versions. This only affects non-scheduled, burnt-out torches, avoiding breaking any redstone contraptions!
CU later
My take on a datapack that replaces redstone component's iron with copper (and some other tweaks)
Minecraft Snapshot 24w33a Redstone Torch Backport
A backport for the new and improved redstone torch texture and model, as well as any blocks that contain the redstone torch, such as the comparator and repeater.

Opti Tech
A client-side modpack for technical redstone players
OreSpawns
The Ore Golem is a powerful mob found deep underground. Made of stone and infused with valuable minerals, it’s tough to defeat. Once killed, it drops ores like coal, iron, copper, gold, redstone, emeralds, diamonds, nether quartz, and ancient debris.
Enhanced Rails
Enhanced Rails supercharges Minecraft rail systems with lightning-fast speeds, automated minecart loading/unloading, and a no-redstone pushback mechanism.
Create Mod-Attack
The Modpack that I use on my german server, it is tech based and adds things like big factorys, moving contraptions or seeing what others are doing in their Inventory and much more
Redstone Torch Equality
You get 4 redstone torches for the recipe
Old Piston Sound Range
Brings back the old 16 block range of piston sounds.
Redstone Indicators
Adds the crafter corner indicators to all redstone inventory blocks.
ItemMagnet — Tiered Item Magnets, Redstone Fuel, Claim Protection
Pull items with visible physics. Redstone fuel, claim protection, in-game config GUI.
NaOH
I added some mods and texture packs aimed at enhancing players' game visuals and FPS, suitable for both survival redstone servers and vanilla survival gameplay.
紅石生電整合包【Redstone Survival Modpack】
為奶油芝士伺服器訂製,單人亦可使用 This modpack customized for the ButterCheese server, also suitable for singleplayer.
Redstone Underwater
Redstone can now be waterlogged!
Basalt Blocks [FABRIC]
Three basalt blocks not enough to decorate? What if there were more basalt blocks, slabs?
Redstone Tweaks (Fork)
Improvements, overlays, and emissive to improve your redstone prowess