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.

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

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