Extreme Optimization!

Links to the direct mods, some mods can be on Fabric, Quilt or Forge. Mod is out of date? Try to find it (or its fork) on CurseForge / Modrinth. Enjoy! (thanks to all the creators of such wonderful mods <3)

Appleskin - Adds various food-related HUD improvements. This is a mostly client-side mod, but it needs to be on the server in order to display accurate saturation/exhaustion values on the client.

DetailArmorBar - The detail armor bar adds more information to the armor bar.

BetterStatisticsScreen - Replaces the Vanilla statistics screen with an new and improved statistics screen that is easier to use and that has more helpful features.

Exordium - Render the GUI and screens at a lower framerate to speed up what's really important: the worldrendering.

DynamicCrosshair - Hides or changes the crosshair dependent on context.

BoatHud - Adds a HUD specifically for boating.

Jade - Fork of HWYLA (fork of WAILA (UI improvement mod aimed at providing block information directly ingame, without the need of opening an UI)) that includes many additional features and bug fixes.

Blur - Gaussian blur shader to the background of all GUIs, which fades into give it a sleek look.

Stendhal - New and enhanced visual utilities for books, signs, anvil and the in-game chat.

Effective - Ambient and environmental interaction effects to enhance immersion.

illuminations - Multiple ambient particles in order to make world more enjoyable at night or in dark places, such as fireflies, glowworms and more.

Visuality - Cosmetic mod that will add a bunch of new particles such as crystal sparkles, particles on mob hitting, custom blob particles for slimes, environmental particles to your Minecraft world.

DynamicSurroundings - Alters the player’s visual and audible experience in Minecraft, and does not alter game mechanics.

DynamicSurroundingsRemastered - BRILLIANT, INCREDIBLE, AMAZING, SHOW STOPPING, SPECTACULAR, NEVER THE SAME, TOTALLY UNIQUE.

ExtraSounds - More sounds to Minecraft, like sounds when you scroll the hotbar, the creative inventory, pick up or place items in inventories, and more.

FirstPersonModel - Enables the third-person Model in first-person, experience Minecraft from Steve's real perspective.

NotEnoughAnimations - Brings a lot of missing third-person animations from the first-person or modifies them to be better representative to how they should look like or look like in the first-person.

EmoteCraft - Create and use emotes in Minecraft.

DamageTilt - When you took damage, your camera angle would tilt in the direction of the damage.

MouseTweaks - Replaces the standard RMB dragging mechanic, adds two new LMB dragging mechanics and an ability to quickly move items with the scroll wheel.

ClickThrough - Helps to access containers that are marked with a sign or item frame.

BactroMod - New possibilities of customizing your visual in-game experience while providing some additional features.

AlternateCurrent - Efficient and non-locational redstone dust implementation.

PlasmoVoice - Voice chat with audio positioning and lots of features.

ReplayMod - Record, relive and share your experience.

Essential - Quality of life mod that boosts Minecraft Java to the next level.

Litematica - Fork of Schematica (Allows you to display a hologram, loaded from a schematic file, for easier rebuilding. You can also save your creations to schematic files and share them).

WDMGSLT - When you break glass with a silk touch pick, you will now be greeted to a new sound that doesn't break your ear drums.

ViaFabric - Allows to connect to older servers with older versions.

Multiconnect - connect to multiple Minecraft server versions.

Raknetify - Uses RakNet to improve multiplayer experience significantly under unreliable and rate-limited connections.

Rebrand - Anonymize or disguise your modded client from servers.

Optifine Substitutes (Hopefully without its bugs )

ETF (1.16+) - Many new Entity Texture Features , including entity and player skin features! Provides more OptiFine parity.

MoreMcmeta (1.16+) - Animate almost any texture with more options.

Animatica (1.17+) - Intended to load the MCPatcher/OptiFine animated texture format.

LambDynamicLights (1.15+) - Adds dynamic lights to the game.

CITResewn (1.17+) - Custom Item Textures allowed resourcepacks to replace the appearance of items when they met certain conditions.

Colormatic (1.14+) - Independent implementation that is resource-pack-compatible with the original Custom Colors mod for Minecraft.

FabricCapes (1.17+) - Use capes from Optifine, LabyMod, and the MinecraftCapes Mod.

Kappa (Snapshots) - OptiFine capes, + aimed for use in snapshots.

Continuity (1.17+) - Allow for the most efficient connected textures experience possible.

OptiFabric (1.14+) - Run OptiFine with Non-Forge Mod Loader.

MCPPPP (1.17+) - Converts from optifine/mcpatcher format to other formats.