Minecraft Development
Everything you need to build your own client: MCP, Forge MDK, Fabric, Weave and OptiFine sources.
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Fabric API
Fabric API, used for creating mods. Unlike Forge, it offers support for Snapshot versions of the game.
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Forge MDK
Forge MDK, used for creating mods. One of the oldest, most supported, and most popular mod loaders for Minecraft.
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MCP
Minecraft Coder Pack (now known as Mod Coder Pack) is used to decompile, change, and recompile Minecraft's client and server. It supports alpha v1.1.2_01 to release 1.12.
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MCP-Reborn
MCP-Reborn is an MCP (Mod Coder Pack) for Minecraft for making modded clients and researching its code. It supports release 1.13 and onwards.
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Optifine SRC
Optifine SRC for adding Optifine to your MCP clients. If the website is down, please use the backup download.
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Weave Loom
Weave Loom, used for creating mods. Unlike Forge and Fabric, Weave isn't for vanilla Minecraft, but rather for Lunar Client.