Fabric Mods for Minecraft 1.21
Browse 61 free Fabric mods for Minecraft 1.21 — popular picks include Snad: Redstone Edition, Additional Redstone, Redstone Sound Slider.
Updated daily
Snad: Redstone Edition
Brings back the Snad Redstone Mechanics !
Additional Redstone
additional redstone mechanics like logic gates and more

Redstone Sound Slider
Adjust your piston / dispenser / trapdoor / buildstone volume separately from other blocks.
Reden
Undo & Redo | Ctrl+Z | Mineacrft Debugger | Redstone Version Control | Any amazing features you can image!!!

JoaCarpet
A small carpet extension mod with useful features for redstone and storage tech (+some minor survival tweaks)
Electromechanics
An addition to the existing Redstone ecosystem mechanically and electrically
Redstone Helper
Mod which must you to help with redstone!
Amarong
Adds a new material called Amarong, handheld "rubber" ducks, kaleidoscopes, and rainbow beacons with no redstone required
SceneBlocks for Cobblemon
Cobblemon utility blocks inspired by our beloved classic mechanics, adding Cut, Rock Smash, Strength, Flash, fog areas, pushable boulders, gates, receivers, and puzzle systems.
Redstone Signal Visualizer
A mod that lets you visualize redstone signals with neat numbers.
Redstone Power Enhanced
Redstone Power Enhanced is a mod that aims to enhance the creative experience in minecraft with new redstone blocks.
Laseredstone
Redstone but we use lasers to transfer signals
AutoFarm-Mod
automatic farming for minecraft 1.21.4-1.21.8
In Game Calculator
Adds a /calculator command to Minecraft for quick in-game math. Supports basic operations, parentheses, crafting math, coordinate conversions, hopper timers, geometry, time conversions, and random number generation — perfect for builders, redstone engineer
Redstone Essentials
A mod that aims to improve the redstone experience when working with complex computational builds
Hero Statue
Adds the Hero Statue block, which can hold an item, and be posed using redstone.
Leafstone
Lock any dripleaf state via redstone
Midrian - Redstone Revolution
It simplifies all Redstone logic gates into single, functional blocks.

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.
Redstone Underwater
Redstone can now be waterlogged!
The Secret of Minecraft(The Secret of the Mimic mod)
Adds a mechanic to the Iron Door, so that when you place an emerald block next to it, it becomes permanently blocked, preventing any redstone signals from reaching the door. And how can I open it? With the Data Diver! This is your master key, allowing you

EZWireless
A simple, lightweight wireless redstone mod.

Redstone Capacitor
Adds a Redstone component inspired by capacitors
Redstone Frequencies
Wireless Redstone with a clean and simple Frequency method
Simple Wireless Redstone
Make redstone easier by making it wireless.
Emerald Rails
A redstone-powered Emerald Rail for Fabric that boosts minecarts 15x faster than powered rails.
Gateways
A vanilla-esque teleport pad mod for both blocks and entities with redstone compatibility
RedstoneAwareEdits
Makes sure your redstone components don't disappear with WorldEdit!
QuasiDusting
This Fabric mod modifies Minecraft's quasi-connectivity (QC) behavior, making it directional and toggleable by using redstone on a QC affected block
Bacon SMP
The Bacon SMP is a mod that introduces custom weapons and a redstone-powered string duper to the game. The custom weapons are crafted from valuable materials. This mod is still in development. There are many bugs.
Gravity Core Block
The Gravity Core Block is a redstone-powered device that creates an 8-block radius anti-gravity field
Missed Tinkering
The combat and tinkering update added some cool things! This mod expands on the tinkering theme to provide some fun new redstone items.
SerialCraft
Bring Redstone to life! A simple mod to connect Arduino and Minecraft via serial port. No complications, just plug and play.
Observer Torcher
This mod allows redstone torches and comparators to react to observer pulses
redstone-structure-block
A Fabric mod that allows saving structures to disk (permanent storage) instead of memory when triggering structure blocks with redstone.

Sculk Eye
Adds a new Sculk Eye Block - scans entities of a given type in a given radius and emits redstone signal based on the count