Client-side tools/mods

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

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.

Food/hunger-related HUD improvements

Render the player skin layer in 3d!

Reduce resource usage while Minecraft is in the background, idle, or on battery.

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

View the contents of shulker boxes from your inventory

A mod implementing the OptiFine/MCPatcher animated texture format

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

A client-side schematic mod with extra features for creative mode work

Fusion allows resource packs to use additional texture and model types such as connected textures!

Take full control over your vanilla game

JEI/REI/EMI plugin that displays breeding information

A mod that modifies the vanilla player model

Record your Minecraft gameplay, play it back and create stunning cinematic shots

Enhance your gameplay experience with animated UI components

A "mini F3" HUD mod, also with various overlays like light level, spawn chunks, slime chunks etc.

The Female Gender Mod introduces extra player model customization options, including a unique feature that adds a personalized touch to your avatar.

A client mod that adds many shortcuts to move items easier and craft faster in inventory screens

Makes it easier to compare equipment by showing a tooltip for what you're already wearing.

Syncmatica is a mod which aims to mod into litematica so that schematics and their placements can be easily shared.

displays block-light level on top of the solid blocks