spigot-dev
There are 2 repositories under spigot-dev topic.
Exortions/PluginUtils
PluginUtils is a simple, easy-to-use library that saves many Minecraft Spigot developers a lot of time when creating plugins. It allows Spigot developers to create a lot of NMS (net.minecraft.server) and Spigot things like Tablists, Scoreboards, etc. with a bunch of lines and classes saved, therefore improving the experience while developing plugins.
UltiKits/UltiKits-i18n
UltiTools-i18n allows developers to easily manage and use multilingual translations. By defining translation files, developers can quickly implement internationalization features.