Bukkit topic
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.
SimplixStorage
Library to store data in a better way
DiscordSRV
Discord bridging plugin for block game https://modrinth.com/plugin/discordsrv
Multiverse-Core
The original Bukkit Multi-World Plugin!
helper
A collection of utilities and extended APIs to support the rapid and easy development of Bukkit plugins.
AnvilGUI
Capture user input in Minecraft through an anvil GUI in under 20 lines of code
SmartInvs
Advanced Inventory API for your Minecraft Bukkit plugins.
MobArena
MobArena plugin for Minecraft
MyPet
🐕 Extensive pet plugin for Bukkit/Spigot
CombatLogX
A modular Spigot plugin that prevents players from logging out during combat and has many expansions for extra features.
advanced-achievements
:fireworks: Popular plugin that adds unique and challenging achievements to Minecraft servers.