MiNET development talk only. Stay on topic. *READ WIKI BEFORE ASKING*

Parse and serialize minecraft packets, plus authentication and encryption.

Minecraft mod development framework used by Forge and FML for the gradle build system

PUBLIC ROOM

Write Minecraft Plugins in JavaScript.

A Minecraft server written in JavaScript

NodeJS Game Server compatible with Minecraft Client

Minecraft guilds plugin

A minecraft PE server written in java

A simple & intuitive Minecraft Server wrapper. Supports IRC, backups, a plugin system, and more.

An OpenSource Minecraft Launcher for .Net Developers

The simple Minecraft web API.

SharpMC - A MineCraft server in C#

A Minecraft bot that does various tasks

Simulate minecraft's redstone mechanics!

MultiMC is a free, open source launcher for Minecraft. It allows you to have multiple, separate (and cleanly separated) instances of Minecraft.

A simple Minecraft Library and API for excellent development of plugins

PvP plugin for Minecraft. Joins all PvP plugins into one.

MCTop.vay.im site engine

Jobs plugin for Sponge

Mod do serwera Minecraft NarutoCraft-PL

Botting API for Minecraft using the client-server protocol

A magic mod for Minecraft based on nature and plant life.

The repo for the How To Train Your Minecraft Dragon Mod, currently only used for issue and milestone tracking

Minecraft server implementation of the Prismarine API

Framework for creating Sponge minigames

A Minecraft mod so dedicated to Rubies and Crystals, it's written in Ruby!

A Minecraft Launcher with nice features and a Modern UI.

Free the New Minecraft Launcher with Energy!

Minecraft plugins implemented in Scala

Website for HeisenBugDev

Provides a web based "Minecraft Server as a Service" (MCaaS?) to deploy Minecraft server containers on any Docker Swarm cluster or standalone Engine instance.

A simple Minecraft clone written in C using modern OpenGL (shaders).

Emasher's Minecraft Mods

Minecraft system project

Parse and serialize minecraft packets, plus authentication and encryption.

A simple html/css/js bootstrap site for community minecraft servers

The Minecraft PE Server API

A forge mod for Minecraft 1.7.10

TabbyChat chat mod for Minecraft

A minecraft mod in development for 1.7

ButlerBoss is a Minecraft Server Manager (Server=Butler, Manager=Boss) Built with Node.js, Socket.IO, and Backbone.js

Minecraft Forge adaptation of the great FPS / tower-defense game : Sanctum 2

My First Mod for Minecraft

Yes, it really is Minecraft in C99. Don't tell anyone.

A minecraft server written in javascript using node-minecraft-protocol