Good stuff

A high-performance rendering engine replacement for Minecraft, which greatly improves frame rates and reduces micro-stutter.

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.

Speed up immediate mode rendering in Minecraft

A builder-based configuration library for Minecraft!

Displays a map of the nearby world terrain, players, mobs, entities in the corner of your screen. Lets you create waypoints which help you find the locations you've marked.

Adds a full screen world map which shows you what you have explored in the world. Works great together with Xaero's Minimap.

A Sodium addon that adds features that shouldn't be in Sodium.

Alternative Options Menu for Sodium

A Minecraft mod that allows for efficient connected textures

A mod that changes how multiple types of culling are handled in order to improve performance

Placeholder and Text manipulation library for your Minecraft mods.

A zoom mod with infinite customizability.

Adds dynamic lights to Minecraft as the most feature-complete and optimized dynamic lighting mod.

See who you're chatting with!

View the contents of shulker boxes from your inventory

A library mod for client-side mods. Contains most of the common/shared code of masa's client mods, and adds some inter-operation support between the dependent mods.

Allows you to play Minecraft in a borderless fullscreen window.

Yeet the laggy reversed DNS lookup for literal IP server addresses

A highly customizable freecam mod.

Allows for render distances greater than the server's view-distance

A Minecraft Mod to record, relive and share your experience.

Durability Tooltip shows you the durability of an item!

Customize the scrolling smoothness or speed in various places like chat, hotbar, creative screen...

Reduces the minimum zoom of Xaero's World Map from 0.0625x to 0.0025x, so you can see everything!

Allows to connect to older servers with older versions

Displays your and other players ping in the tab list.

Create keybinds for commands!

Making barriers visible and other mapmaking help.

Automatically reconnect to a restarting server while AFK!