Minecraft Java 1.17 Mods
Browse 6 free mods for Minecraft Java 1.17 — popular picks include FancyFast Bushy Leaves, EzRTP, Human Villagers.
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FancyFast Bushy Leaves
Forces Fast Leaves rendering to improve performance with bushy textures, ensuring better FPS in dense biomes like jungles or mangrove swamps, even when using shaders.
EzRTP
Advanced Random Teleport (RTP) plugin for Paper, Spigot, Purpur and Folia. Safe random teleportation with biome filters, GUI world selection, Vault economy support, cooldowns, WorldGuard integration and high-performance teleport caching for Minecraft serve
Human Villagers
Human-style villagers with biome-based facial diversity and 200+ unique appearances. Supports Random Entities using OptiFine, CIT Resewn, or (EMF - ETF) - only one is required.
DarkerBiome Zombies
Zombies per biome, from DarkerStory server RPG, optifine needed

Idyllon Biome-Dependent Stone Add-On
This is a resource pack that adds a few different textures to stone/ores/stone-derived blocks in certain biomes that would reasonably have different types of stone. Requires Continuity or Optifine.
adapted mobs
adapted mobs is a resource pack which changes mobs textures to fit the biome the mob is in, this pack requires optifine on java and has a bedrock version too