Welcome to the PermissionsEx wiki!
NOTE: The contents of this wiki are for PEX 1.x. 2.x dev builds work quite a bit differently, and have a different section of documentation available in the doc/ folder
PermissionsEx (PEX) is the oldest and most powerful permissions plugin available for Bukkit today. It has been around since the days of Permissions 2.x (in 2011) and continues to be supported and updated today.
But PEX is more! It offers different back-ends, powerful structured in-game command-management and fine grained restrictions set for world modification called Modifyworld