Useful

The fastest and most compatible rendering optimization mod for Minecraft. Now available for both NeoForge and Fabric!

A modern shader pack loader for Minecraft intended to be compatible with existing OptiFine shader packs

Using async path-tracing to hide Block-/Entities that are not visible

Memory usage optimizations

Adds a mod menu to view the list of mods you have installed.

No-compromises game logic optimization mod. Well suited for clients and servers of all kinds. Now available for Fabric and NeoForge!

Speed up immediate mode rendering in Minecraft

All-in-one mod that improves performance, reduces memory usage, and fixes many bugs. Compatible with all your favorite performance mods!

Sodium addon providing support for the Fabric Rendering API, based on Indigo

A Minecraft mod that allows for efficient connected textures

A zoom mod with infinite customizability.

Fixes Minecraft bugs found on the bug tracker

Disable's the Experimental Settings popup, which appears when you create or load world.

What the hell is that?

A tree-style questing mod, allowing pack makers to make and include completable quests for their players

The most customizable free maintenance plugin for your Minecraft server you can find. It runs on Paper, Velocity, Bungee, as well as Sponge.