Essentials is a hugely popular group of plugins, which has multiple jars, which serve different tasks. Essentials - the main part of the plugin which handles signs, most of the commands, and the economy api. Essentials Chat - handles chat formatting and prefixes Essentials Spawn - handles spawning and respawning Essentials Anti-build - building permissions system Essentials Protect - a basic world protection system Essentials Groupmanager - full permissions system (standalone)