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.
CatServer
高性能和高兼容性的1.12.2/1.16.5/1.18.2版本Forge+Bukkit+Spigot服务端 (A high performance and high compatibility 1.12.2/1.16.5/1.18.2 version Forge+Bukkit+Spigot server)
Skript
Skript is a Bukkit plugin which allows server admins to customize their server easily, but without the hassle of programming a plugin or asking/paying someone to program a plugin for them.
CraftBook
🔧 Machines, ICs, PLCs, and more!
NoCheatPlus
Anti cheating plugin for Minecraft (Bukkit/Spigot).
Essentials
The modern Essentials suite for Spigot and Paper.
AuthMeReloaded
The best authentication plugin for the Bukkit/Spigot API!
PlotSquared
PlotSquared - Reinventing the plotworld
FastAsyncWorldEdit
Blazingly fast world manipulation for artists, builders and everyone else: https://www.spigotmc.org/resources/13932/
HolographicDisplays
Create modern looking holograms in Minecraft.
OpenAudioMc
A real time proximity voice chat and music plugin for Minecraft. Doesn't require mods or any user setup.