Minecraft Java 1.21 Mods
Browse 7 free mods for Minecraft Java 1.21 — popular picks include SL Library, Slashbridge, Tiny DataLib.
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SL Library
Adds various base utilities, synchronization help, policy, packet sending and data driven

Slashbridge
serverside utility mod aiming to add in minecraft commands that I think the base game lacks, bridging datapack and mod function.
Tiny DataLib
This project is a library with useful utilities such as a database system and more.
MysticLib
Core shared library for all Mystic Minecraft plugins — provides database pooling, logging, plugin registry, and utilities.
Cobblemon Tim Core Mod (1.21.1, 1.21) – Essential Library For Pokemon Modding
Cobblemon Tim Core Mod serves as a shared codebase to reduce code duplication across the developer's Cobblemon-related mods, providing common utilities, fixes, and extensions. It's essential for modpacks using multiple "Tim" Cobblemon addons, ensuring consistent behavior and performance. Features: Base classes for mod structure and config handling. Simplified config creation with overridable settings. Tools for […]
Tweakeroo Update Port Mod (1.21.11, 1.21.1) – More Control, Better Building
Tweakeroo Update Port Mod is a versatile client-side mod packed with quality-of-life tweaks. From Accurate Block Placement to Free Camera and Gamma Override, this mod gives you fine-grained control over your gameplay. Features: Popular tweaks include: Hand Restock. Flexible/Accurate Block Placement. Fast Click (left/right) Gamma Override (see in the dark) Free Camera mode. Fully client-side; […]
RFTools Utility Mod (1.21.1, 1.20.1) – Tons of General Tools and Utilities
RFTools Utility Mod is the newest version of the original RFTools with tons of general tools and utilities. This is still alpha and currently only contains the teleportation system and the crafter. This mod is intended to be used together with RFTools Power and depends on RFTools Base and McJtyLib. Features: It contains the following […]