Bukkit

Creates images and pixel-art using in-game blocks

Plugin Manager For Bukkit

copy player inventory on MySQL

VT or Skript like plugin allow you from shallow functionality to deep access to the server itself.

Create scrollable command menus

Grants developers access to a library of various effects.

Run scripts on triggers such as Walk, Click, PlayerDeath, Respawn, BlockBreak & many others. Use Object Variables, IF & ELSE.

Automatically have player ranks change depending on how long they have been online.

Scriptable, interactive citizens.

OpenTexonMod

CompatNoCheatPlus

A collection of many useful developer tools for promoting compatibility and ease of development

Contains permission, math, trig, world, entity, block, scheduler, reflection and more utilities

Easy prefixes and suffixes for in-game chat using permissions (Simple Prefix)

An inventory framework for managing GUIs

SwearinBlocker

A fast cross-version particle API for Spigot and Bukkit server.

EnchantmentAPI enables simple custom enchantment creation that behave like any vanilla enchantments!

WhatIsIt

Tracks PvP and PvE deaths with customizable messages. Keeps track of stats.