Fabric Mods for Minecraft 1.21
Browse 14 free Fabric mods for Minecraft 1.21 — popular picks include Spell Engine Extension (RPG Series Tweaks), Eva's Scroll Tweaks, Mob AI Commands.
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Spell Engine Extension (RPG Series Tweaks)
Extends the mod 'Spell Engine' with additional functionality.
Eva's Scroll Tweaks
Keybindable scrolling, keybinds to mimic scrolling, and horizontal scrolling compatibility!
Mob AI Commands
A standalone version of the commands added by Mob AI Tweaks mod
CobbleTypes Master
The Ultimate Pokemon Type Utilities in minecraft and cobblemon! Type Chart, Team analysis, Scanning and much more!
Inv Tweaker
Inventory sorting and grouping mod, also has auto fill for the hotbar
Clutch
In some cases a clutch will be impossible. This mod shows whether a clutch is doable and how difficult it will be, alongside many other clutching utilities.
OnlyWaypoints
A Minecraft Fabric Mod that adds bloat-free Waypoints with a Vanilla feel to the game
Fruitbridge
This mod contains Fruitbridging utilities to assist players. Features are designed for both the Distance and Java 12b leaderboards.
F.Essentials
F.Essentials is a feature-rich mod for Fabric that brings essential server commands and utilities to Minecraft. Designed to make server management and player interaction easier.

Slashbridge
serverside utility mod aiming to add in minecraft commands that I think the base game lacks, bridging datapack and mod function.
Vuurkrab’s Tweaks
A collection of small client-side tweaks to improve your Minecraft experience, focused on PvP, visuals, sound, and more.
Cord Manager
A client-side utility mod that allows you to save, and manage important coordinates with a single hotkey.
SimpleCore by Cooshh
A shared core library for Simple mods, providing common systems like economy support and shared utilities.
Seva ya Utils
A utility mod for Seva ya Season 6, includes the server shop, milestones and custom currency