
Lightweight and modular API providing common hooks and intercompatibility measures utilized by mods using the Fabric toolchain.
51.33M downloads
18.6k followers
Lightweight and modular API providing common hooks and intercompatibility measures utilized by mods using the Fabric toolchain.
51.33M downloads
18.6k followers
The fastest and most compatible rendering optimization mod for Minecraft. Now available for both NeoForge and Fabric!
50.51M downloads
23.5k followers
Configuration Library for Minecraft Mods
38.62M downloads
9,656 followers
A modern shader pack loader for Minecraft intended to be compatible with existing OptiFine shader packs
36.11M downloads
17.2k followers
Using async path-tracing to hide Block-/Entities that are not visible
32.98M downloads
9,515 followers
Memory usage optimizations
30.84M downloads
8,961 followers
Adds a mod menu to view the list of mods you have installed.
30.01M downloads
16.0k followers
No-compromises game logic optimization mod. Well suited for clients and servers of all kinds. Now available for Fabric and NeoForge!
29.26M downloads
14.7k followers
This is a mod that enables usage of the Kotlin programming language for Fabric mods.
24.41M downloads
6,281 followers
An intermediary api aimed to ease developing multiplatform mods.
24.23M downloads
4,637 followers
A builder-based configuration library for Minecraft.
24.04M downloads
5,032 followers
Emissive, Random & Custom texture support for entities in resourcepacks just like Optifine but for Fabric
21.27M downloads
5,726 followers
Food/hunger-related HUD improvements
20.26M downloads
8,819 followers
Sodium addon providing support for the Fabric Rendering API, based on Indigo
19.70M downloads
8,509 followers
EMF is an, OptiFine format, Custom Entity Model replacement mod available for Fabric and Forge.
19.62M downloads
5,330 followers
Adds a full screen world map which shows you what you have explored in the world. Works great together with Xaero's Minimap.
19.43M downloads
6,413 followers
A Minecraft mod that allows for efficient connected textures
18.00M downloads
9,265 followers
NeoForge's & Forge's config systems provided to other modding ecosystems. Designed for a multiloader architecture.
14.18M downloads
2,442 followers
Abstraction Layer for Multiplatform Mods
13.84M downloads
1,607 followers
Preserving the elements of Minecraft with exceptional quality, detail, and performance.
13.28M downloads
5,818 followers
Adds dynamic lights to Minecraft as the most feature-complete and optimized dynamic lighting mod for Fabric.
13.14M downloads
8,525 followers
A 3D animation library for entities, blocks, items, armor, and more!
12.99M downloads
1,653 followers
Just another boring library mod.
12.81M downloads
398 followers
JEI - View Items and Recipes
11.92M downloads
4,894 followers
Customize Minecraft's menus with ease!
11.86M downloads
992 followers
Fixes gaps in Block Models and Item Models
11.15M downloads
2,732 followers
An open source library for other mods!
10.87M downloads
787 followers
A mod to optimize the Minecraft networking stack
10.79M downloads
3,975 followers
Enhances inventory management by adding various functions to the mouse buttons.
10.63M downloads
4,260 followers
A general utility, GUI and config library for modding on Fabric and Quilt
9.99M downloads
1,402 followers
..An Overly complicated Sound Mod...
9.76M downloads
4,402 followers
Clumps XP orbs together to reduce lag
9.30M downloads
2,737 followers
OpenAL-based library mod for playing background music.
9.18M downloads
162 followers
Adds a neat little particle effect to leaf blocks
9.00M downloads
4,442 followers
A library mod for adding biomes in a simple and compatible manner!
8.92M downloads
1,174 followers
Library mod for YUNG's mods.
8.80M downloads
1,709 followers
dynamic data pack and registration, villager activities, custom map marker and a lot more
8.61M downloads
906 followers
Provides a way to get enchantment descriptions from enchanted books.
8.42M downloads
1,634 followers
Clean and Customizable. Alternative to Just Enough Items/JEI.
8.03M downloads
3,146 followers
Rewrites the light engine to fix lighting performance and lighting errors
7.73M downloads
4,421 followers
Makes the game boot faster by deferring non-essential initialization
7.68M downloads
4,038 followers
Accessible, Data-Driven, Dependency-Free Documentation for Minecraft Modders and Pack Makers
7.61M downloads
960 followers
Allows for render distances greater than the server's view-distance
6.45M downloads
3,719 followers
animate the player
6.21M downloads
800 followers
A data-driven accessory mod
5.89M downloads
1,917 followers
A complete redesign of Minecraft's Nether fortresses!
5.88M downloads
1,801 followers
A complete redesign of Minecraft's dungeons!
5.79M downloads
2,024 followers
A long-awaited and much-needed abandoned mineshaft overhaul!
5.76M downloads
2,013 followers
A complete redesign of Minecraft's ocean monuments!
5.71M downloads
1,729 followers
Shared library mod for Corosus's mods
5.49M downloads
241 followers
Improves third person camera view.
5.47M downloads
2,355 followers
Improves performance by tweaking mob despawn rules. Say bye to pesky unintentional persistent mobs.
5.35M downloads
1,306 followers
Addon for FancyMenu to customize the loading screen.
5.27M downloads
185 followers
A complete redesign of Minecraft's jungle temples!
5.23M downloads
1,372 followers
A complete redesign of Minecraft's strongholds!
5.21M downloads
1,886 followers
Adds overhauled witch huts to swamps!
5.20M downloads
1,540 followers
An overhaul of the main End Island where the dragon fight takes place!
5.19M downloads
1,315 followers
Ensures correct destinations when travelling back and forth through Nether Portals in Multiplayer.
5.10M downloads
808 followers
Resourceful Config is a mod that allows for developers to make cross-platform configs
4.92M downloads
459 followers
A data attachment API that is easy, modular, and extremely fast.
4.74M downloads
731 followers
Adds a configurable numerical ping display to the player list
4.66M downloads
1,717 followers
Explore almost 100 new biomes consisting of both realism and light fantasy, using just Vanilla blocks. Complete with several immersive structures to compliment the overhauled terrain.
4.66M downloads
4,491 followers
Adds beautiful naturally generated bridges throughout the world!
4.65M downloads
1,311 followers
Makes grass and related blocks use the top texture on the sides. Works with other resource packs!
4.58M downloads
1,302 followers
⚔️ Easy, spectacular and fun melee combat system from Minecraft Dungeons.
4.51M downloads
2,849 followers
A library mod used by IMB11's mods to function.
4.47M downloads
862 followers
A complete redesign of Minecraft's desert temples!
4.42M downloads
1,651 followers
Spice up your world with new villages, pillager outposts, and even new ships!
4.29M downloads
2,464 followers
A Library mod for easy structure config and runtime datapacks.
4.27M downloads
604 followers
New Biomes, mysterious rituals and Mobs for your End
4.17M downloads
2,503 followers
Enables the third-person Model in first-person
4.11M downloads
2,336 followers
Completely Customize the way others see you play in Discord!
4.09M downloads
656 followers
Adds the ability to claim chunks and make player parties, integrates with Xaero's Minimap and World Map
4.08M downloads
657 followers
Improves the appearance of leaves with high mod compatibility and performance!
4.07M downloads
1,910 followers
Localizes the wither and dragon death sounds.
4.05M downloads
134 followers
A Library Mod for the BetterX Team
3.99M downloads
542 followers
Pre-generates chunks, quickly and efficiently
3.96M downloads
3,123 followers
Dust is a Minecraft mod that adds the white ash particle from the Basalt Deltas biome to the underground to simulate dust!
3.91M downloads
1,535 followers
Massively altered world generation with mountain ranges, underground rivers and more!
3.83M downloads
4,409 followers
Break down your trees by only cutting one piece of it
3.72M downloads
2,444 followers
A mod that makes it so nobody misses out on Loot! All loot chests are instanced per player and visually unique.
3.52M downloads
596 followers
More Biomes, More Mobs, More Tools for the fiery Dimension
3.51M downloads
1,874 followers
Extra structures, features, and vanilla+ content suitable for any modpack!
3.50M downloads
1,260 followers
A library mod containing code used across Corgi Taco's mods.
3.49M downloads
156 followers
A Minecraft mod which features more blocks, items, armors, and hidden mysteries to complement the Deep Dark biome.
3.48M downloads
1,325 followers
Bad Packets allows packet messaging between different modding platforms.
3.45M downloads
1,092 followers
Ship default Data- & Resourcepacks with Modpacks!
3.36M downloads
191 followers
The platform-agnostic, Architectury based library used in all of JamCoreModding's mods
3.34M downloads
532 followers
Adds accessory support to the elytra so you can fly and wear chest armor at the same time. Formerly known as Curious Elytra and Elytra Trinket.
3.18M downloads
1,423 followers
A subtle-ish overhaul of vanilla Overworld biomes! Reworked!
3.02M downloads
2,311 followers
Lets you change the size of most entities, shrinking their scale smaller or growing them larger
2.89M downloads
706 followers
Allows you to harvest crops with right click
2.79M downloads
1,434 followers
A personal utility library for my mods.
2.69M downloads
116 followers
A mod which overhauls the vanilla creepers!
2.63M downloads
1,523 followers
Replaces weather with prettier particle effects
2.51M downloads
2,439 followers
Modifes spiders to be more realistic
2.50M downloads
1,544 followers
Hostile mobs dig out of the ground or poof into existence when they spawn!
2.45M downloads
2,053 followers
Adds culling to leaf blocks, providing a huge performance boost over vanilla.
2.28M downloads
1,556 followers
A Library for Forge and Fabric with utilities such as Render Features, Recipe Books and Wood API
2.26M downloads
417 followers
Adds new variants to existing mobs.
2.25M downloads
1,780 followers
adds a new endboss and other creatures
2.22M downloads
537 followers
Make items blink when they're about to despawn
2.16M downloads
935 followers
Take full control over your vanilla game
2.11M downloads
1,629 followers
A Kotlin Library Mod
1.98M downloads
100 followers
Let's do Wine!
1.97M downloads
1,085 followers
Load resources on game start, like a resource pack, but enabled by default.
1.96M downloads
135 followers
Adds bounty boards, giving rewards for collecting different blocks and items.
1.95M downloads
853 followers
What the hell is that?
1.94M downloads
1,748 followers
A stylized, horror themed Iris shaderpack with high customizability and performance.
1.90M downloads
666 followers
🧶 Adds combat roll ability, with related attributes and enchantments.
1.82M downloads
716 followers
Makes the loading screen darker.
1.82M downloads
1,195 followers
A better way of transport
1.79M downloads
755 followers
Structure mod that brings an exciting twist to Minecraft by introducing hostile and unfriendly pillages, providing a thrilling contrast to the peaceful villages.
1.79M downloads
493 followers
Highly configurable third person camera mod
1.71M downloads
764 followers
Regions Unexplored is a biome mod that overhauls the overworld and nether in many ways. With 70+ new biomes to explore, there is a plethora of new things to find!
1.70M downloads
1,044 followers
🪄 Data driven magic library
1.59M downloads
376 followers
🔮 Spell Power entity attributes with related status effects and enchantments
1.59M downloads
338 followers
Open source library for a couple of Globox_Z mods
1.57M downloads
92 followers
A simple and configurable mod that makes all (even datapacks and modded) structures more spread out (or more common!), essentially making them rarer/easier to find. Useful in big modpacks with a lot of structures mods to encourage exploration
1.55M downloads
465 followers
adds bubbles above your head when you chat
1.52M downloads
422 followers
Target Dummy that show damage dealt and can be equipped with armor
1.50M downloads
523 followers
A striped down Azurelib just for Armor!
1.48M downloads
181 followers
It's Tea Time! Brew Tea, Coffee and Flasks.
1.46M downloads
454 followers
Beautiful clouds in touch with the vanilla style
1.44M downloads
1,778 followers
Adds snow under trees in snowy biomes, making the biomes more immersive.
1.43M downloads
616 followers
Trees are round in real life, why aren't they in Minecraft?
1.37M downloads
683 followers
A significantly faster Random Generator implementation for Minecraft, with near vanilla parity.
1.32M downloads
458 followers
Smarter more aware zombies (and others), they track you down via blood scent, sound, and light source awareness
1.31M downloads
172 followers
Adds drawers and more
1.30M downloads
298 followers
Guards that help with village pest control
1.28M downloads
501 followers
🪨 Craft runes to serve as ammo for spells
1.27M downloads
308 followers
A mod that adds structures, mobs, bosses and blocks themed aroung the graveyard.
1.24M downloads
482 followers
🧙🏻♂️ Destroy your enemies with Arcane, Fire and Frost magic
1.23M downloads
990 followers
A Mod offering a slight overhaul for the meadow biome by adding two new sub biomes and introducing the process of crafting cheese.
1.15M downloads
519 followers
✨ Protect and heal your friends as a Paladin or a Priest
1.14M downloads
679 followers
Fabric client-side mod designed to improve Minecraft's ambience through particles, visual effects and sounds
1.12M downloads
2,594 followers
Terrestria is a detailed and vibrant biomes mod for Minecraft running on the Fabric mod loader.
1.10M downloads
547 followers
A hand-drawn client-side world map with biomes, structures, waypoints, and less! A fourth-generation rewrite of Hunternif's Antique Atlas utilizing Surveyor.
1.06M downloads
1,293 followers
Decorate your home!
1.05M downloads
600 followers
🏹 Draw, Release, Conquer - Master the art of Archery!
1.05M downloads
690 followers
💍 Find precious gems deep down, and craft them into powerful jewelry!
1.01M downloads
659 followers
Befriend legendary creatures to accompany you across the world!
995.7k downloads
499 followers
Herds just start to panic when a member panics
987.2k downloads
254 followers
Build roofs with actual roofs instead of stairs!
977.3k downloads
362 followers
Highly configurable tooltip rendering, so you can always read them!
914.5k downloads
478 followers
Adds a bunch of colourful and unique wings that can be worn in the Trinkets Cape slot.
911.2k downloads
430 followers
CraftTweaker allows modpacks and servers to customize the game. With CraftTweaker you can change recipes, script events, add new commands and even change item properties!
903.7k downloads
214 followers
A small library mod for Epherical mods (Croptopia/ServerBrowser)
891.0k downloads
21 followers
Keep your weapon always ready
814.6k downloads
337 followers
Library for creating better server side content!
799.4k downloads
391 followers
🏹 Create fully functional bows and crossbows, with ease
799.2k downloads
122 followers
Skills to level your character
798.6k downloads
557 followers
Adds new spooky biomes to the Nether
776.7k downloads
189 followers
Adds new paintings to Minecraft
767.9k downloads
177 followers
A mod adding new Lunar Events like blood moons and harvest moons!
750.4k downloads
438 followers
Fish up real entities instead of the items! Configurable with Datapacks!
728.0k downloads
175 followers
Adds extra animals and insects to Minecraft!
721.9k downloads
482 followers
Forge and Fabric Unified Networking Solution
691.7k downloads
101 followers
Nether Depths Upgrade is a small mod that adds some extra flora and fauna to the lava seas of the nether. A total of nine fish have been added, a new enchant and potion in order to explore the lava in the nether.
684.0k downloads
163 followers
A biome mod expanding the life of The Nether
673.3k downloads
422 followers
An open source resource and data loader for Minecraft.
645.0k downloads
76 followers
Make's Minecraft's rivers much more exciting to explore!
632.1k downloads
140 followers
Addon for the BackSlot mod which enables double sword on the players back
623.3k downloads
123 followers
LevelZ mod addon which adds jobs
618.2k downloads
234 followers
A mod that aims to add witchcraft to Minecraft
616.4k downloads
318 followers
Unified API, networking, and save data for map mods.
611.6k downloads
153 followers
A mod that lets you store your experience in multiple ways!
591.7k downloads
78 followers
Automatically put yourself in third-person mode when you perform certain actions. Clientside only! Configurable!
585.4k downloads
397 followers
The farm calls: Experience the art of advanced agriculture and farmhouse cuisine! Use mincers, cooking pots, as well as new grains and fruit varieties to enhance your culinary and agricultural skills.
580.2k downloads
326 followers
Client side item storage - remember where you've put things.
564.5k downloads
1,037 followers
An astounding sequel to the original BYG mod for 1.20.1+ with over 50+ biomes ranging from the magical to the realistic and all breathtaking!
562.2k downloads
510 followers
An extension mod to add Trinkets support to XP Storage
558.0k downloads
32 followers
⛲️ Village structures hosting small spell libraries
554.3k downloads
274 followers
A compatibility bridge between Curios API or Trinkets API and dynamic light mods such as Lucent or LambDynamicLights. Formerly known as Curious Lights.
528.1k downloads
200 followers
🗡️ Silent Blades, Mighty Blows - Dominate with martial skills!
517.4k downloads
362 followers
Tree library used by popular mods such as Oh The Biomes You'll Go.
514.1k downloads
80 followers
Smooth and interactive animations. Customizable and compatible!
502.9k downloads
678 followers
Fair-play edition of the Xaero's Minimap mod, designed for fair PVP against players without a minimap.
500.9k downloads
286 followers
Armor and Tool durability HUD
499.5k downloads
763 followers
Remove recipes with just a config
497.9k downloads
47 followers
A Minecraft Fabric mod for 1.20.1 that adds colorful and customizable loot beams to dropped items!
495.3k downloads
184 followers
Enhances fog rendering with dynamic, customizable effects—improving atmosphere and depth while preserving the vanilla experience and maintaining compatibility with other mods.
493.8k downloads
987 followers
Bake many variations of Bread, Cupcakes and Cakes! Eatable, placeable. This version was made for improved compat with [Let's Do] Farm & Charm
489.0k downloads
137 followers
Adds a cooking book and multiblock kitchens that only shows recipes you can make with what you currently have in your inventory.
486.1k downloads
343 followers
Welcome to Candlelight! This version was made for improved compat with [Let's Do] Farm & Charm
483.0k downloads
95 followers
Control length of day and night!
474.6k downloads
83 followers
A datapack/mod to remove the intro message that appears with Terralith.
473.5k downloads
175 followers
This mod changes night vision flickering/flashing when status effect is expiring to gentle fade-out animation over last 5 seconds(configurable)
470.0k downloads
163 followers
Welcome to the Brewfest! This version was made for improved compat with [Let's Do] Farm & Charm
465.8k downloads
100 followers
Spooky and scary new biomes
455.1k downloads
214 followers
Modifies combat to prevent friendly fire to pets and other mobs.
455.0k downloads
188 followers
Adds new vanilla+ cave biomes and underground content!
406.4k downloads
403 followers
A tiny mod that allows two players to sit on one horse, donkey, mule etc.
380.9k downloads
136 followers
Extra Features for Carpet Mod
344.0k downloads
359 followers
An all-in-one solution that works
297.8k downloads
768 followers
Makes maps work better in the Nether and in other cave dimensions.
288.2k downloads
239 followers
A biome expansion mod that embraces the simplistic nature of Minecraft biomes
257.9k downloads
501 followers
Improves some things related to climbing
257.8k downloads
189 followers
Makes soul fire actually have unique properties
248.4k downloads
96 followers
The carpet extension to fix all vanilla minecraft bugs
245.6k downloads
519 followers
Explore a redesigned overworld: new animals, reshaped biomes, livelier landscapes.
230.3k downloads
286 followers
Extending the inventory "physically" (adding slots) through various bags.
210.9k downloads
227 followers
A vanilla-friendly mini-map/world-map mod using vanilla Maps!
166.2k downloads
653 followers
Terralith compatibility with Tectonic!
153.0k downloads
496 followers
Adds plenty of new cool Banner Features
145.3k downloads
167 followers
An iteration of Spice of Life built for Fabric
141.7k downloads
145 followers
Adds new items to allow you to wear torches and lanterns on your hip!
128.9k downloads
59 followers
Adds simple damage number particles when any entity takes damage
125.8k downloads
177 followers
A simple mod that allows your pets to respawn after death when you next sleep using a new item, the Etheric Gem.
120.9k downloads
115 followers
Increase your step height - like autojump but without the disadvantages
114.3k downloads
213 followers
This pack turns villagers into human players with alot of diversity and variants. Also supports Fresh Animations, instructions in gallery
105.9k downloads
394 followers
A [Let's Do] Farm&Charm Corn addon
95.7k downloads
39 followers
Pumpkin Carving, Corn food and Halloween Trick or Treating for villagers. Farmers Delight and Autumnity compatibility. Not just a seasonal mod
93.1k downloads
227 followers
Enhances and improves the Minecraft fishing system and adds 60+ new fish to the game!
90.0k downloads
323 followers
Drodi’s Villagers tries to combine aesthetics and utility to make Villagers more visually interesting
79.6k downloads
193 followers
Want longer or shorter in-game days/nights? So did I.
76.1k downloads
156 followers
A biome placement mod focusing on configurability and consistent distribution of modded biomes
75.9k downloads
122 followers
Serverside Claiming Mod
75.1k downloads
93 followers
Allows server administrators to conveniently disable the entity radar, mini-map, and other features of the Xaero's Map series of mods to make competitive play fairer
74.4k downloads
68 followers
Updates zombies to look more realistic with physics-like animations
73.6k downloads
196 followers
Drodi’s Illagers reimagines Illagers with new models, textures, variations, and features!
69.1k downloads
179 followers
Overhauled generation to the biomes of the Overworld.
62.2k downloads
297 followers
Adds Better Combat weapon compatibility for the Bewitchment mod.
59.7k downloads
41 followers
Introduces new cat breeds while updating the existing ones to look more realistic (Optifine/Fabric support)
52.0k downloads
161 followers
A quick way to get rid of a biome. Useful for tweaking datapack-based generators (like Terralith) that don't have a convenient configuration
50.0k downloads
165 followers
New models and animations, shapeshifting creepers, dismemberment and more!
48.6k downloads
227 followers
Adds wind into your Minecraft world for an immersive quality of life improvement!
44.9k downloads
440 followers
Gives more control over the mobGriefing game rule by splitting it into four.
44.9k downloads
149 followers
Renders the last used tool in player's back
44.7k downloads
115 followers
Timestamp, notifier, macros, chat bubbles, chat filter; everything you need is here!
39.4k downloads
131 followers
Client-side sound enchancing fabric mod that adds a few sound filters depending on your current location: Reverb in caves and the nether, muffling when submerged and quieter sounds when behind walls.
39.4k downloads
223 followers
Plays a sound when Minecraft is finished loading.
39.1k downloads
43 followers
Updates Skeletons to look more realistic with more lifelike animations
37.4k downloads
62 followers
MAmbience adds a large amount of dynamic ambient effects to minecraft. This includes ambient sounds, visual (particle based) and advanced footstep sounds. All of this while remaining fully compatible with vanilla clients using a simple resourcepack.
37.1k downloads
181 followers
A mod that allows clerics and blacksmiths to heal injured villagers and iron golems.
35.3k downloads
89 followers
A vanilla friendly and open-source mod that intends to make the lanterns more useful when adventuring or caving.
31.6k downloads
25 followers
this mod is for very smart people who need a mod to know if they can mine a block.
30.4k downloads
65 followers
A highly customizable Minecraft Fabric Mod that makes items stackable and changes their stack size.
27.2k downloads
94 followers
11 New cave/underground biomes
26.3k downloads
100 followers
Adds spooky forest creatures like wisps, moths, hidebehinds, and the hirschgeist!
21.8k downloads
59 followers
Highly customizable, fast and fully featured solution to factions for Fabric
16.9k downloads
92 followers
Overhauls vanilla biomes, with new trees and fungi!
16.2k downloads
172 followers
Unobtrusive, player-readable coordinates, day, time, facing direction, and biome - with toggle/hold key modes. An alternative to minimaps and F3.
14.3k downloads
55 followers
Add Wall Climb mechanic to minecraft
13.9k downloads
51 followers
🟦 Shows team colored capes, for players in teams. 🟥
13.4k downloads
50 followers
Set default game rules cross saves
8,301 downloads
1 follower
Adds compatibility between items & blocks from the Bewitchment mod and the level-gating feature from LevelZ.
6,839 downloads
16 followers
Removes the glint effect from potions
6,595 downloads
32 followers
Redesigned Animal mobs!
5,098 downloads
26 followers
A way to automate the whitelist of a minecraft server based on discord roles
4,749 downloads
49 followers
A 'Hunger Overhaul' inspired take on the health and food systems of Minecraft for Fabric.
3,553 downloads
31 followers
An add-on for Enhanced Celestials that adds a Black moon, giving players blindness
3,521 downloads
9 followers
Beezy's CEM Endermen Overhaul
3,075 downloads
25 followers
Put snow inside other blocks. Also adds some pretty snow effects
2,421 downloads
33 followers
Adds a command for server admins to toggle their OP powers on and off
2,129 downloads
11 followers
Simple server mod for Fabric to hide the names of players. With this mod you will not see them at all.
1,229 downloads
9 followers
This is a mod designed at bringing 'Dead Souls' to Fabric with some improvements and additional features. Dead Souls heavily inspired this mod.
634 downloads
9 followers