Bukkit Ecosystem
Bukkit is a Minecraft server modification software and API, and while the original project itself is stale, forks like PaperMC and Spigot are actively maintained, and most plugins and servers use some variant of Bukkit.
Core Projects
MorePopular Projects
MorePaper
The most widely used, high performance Minecraft server that aims to fix gameplay and mechanics inconsistencies
Mohist
Minecraft Forge Hybrid server implementing the Spigot/Bukkit API, formerly known as Thermos/Cauldron/MCPC+
Geyser
A bridge/proxy allowing you to connect to Minecraft: Java Edition servers with Minecraft: Bedrock Edition
MockBukkit
MockBukkit is a mocking framework for bukkit to allow the easy unit testing of Bukkit plugins
Slimefun4
Slimefun 4 - A unique Spigot/Paper plugin that looks and feels like a modpack
Glowstone
A fast, customizable and compatible open source server for Minecraft: Java Edition
ViaVersion
Allows the connection of newer clients to older server versions for Minecraft servers
packetevents
PacketEvents is emerging as a strong contender in the realm of Minecraft packet processing libraries
MinecraftDev
Plugin for IntelliJ IDEA that gives special support for Minecraft modding projects
Up and Coming Projects
More
conventional-window
A lightweight Minestom menu library, with support for Bukkit platform
CommandsFramework
color-converter-lib
intuitive library to convert minecraft, bukkit, hex, & cmi color codes in strings
ChatterX
ChatterX is a useful tool for customizing your server chat with fun HEX color and awsome prefixes/suffixes from Luckperms
Enhanced-Surveillance
Spigot/Paper plugin that monitors and logs all in-game events for complete server oversight
SurvivalTweaks
Created to add some useful mechanics for useless items in game minecraft
