A good combination

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

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.

Emissive, Random & Custom texture support for entities in resourcepacks just like Optifine but for Fabric

EMF is an, OptiFine format, Custom Entity Model replacement mod available for Fabric and Forge.

Food/hunger-related HUD improvements

Render the player skin layer in 3d!

A core mod

View the contents of shulker boxes from your inventory

Reduce block entity FPS lag with almost no compromises, and improve their visuals

Optimises worldgen performance for a better gameplay experience.

Pre-generates chunks, quickly and efficiently

The cape shouldn't be a static slab

In-game resource pack, data pack and shader browser and updater.

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

Enhancing Minecraft's experience with a variety of 30+ QOL features, like player sitting and a day counter.

Old (and not so old) world generation for modern Minecraft!