PermiX is an emerging rank creation and permission management system, where only your knowledge sets the limit! Rank creation in this plugin is extremely smooth (You can see it in the commands - permissions section)

We strive to design a truly sophisticated and usable plugin for players and developers

Commands - Permissions:

Main Command Access
/permix - permix.command

Group Management
/permix creategroup [name] - permix.creategroup
/permix deletegroup [name] - permix.deletegroup
/permix group <group> <prefix/suffix/permission> set <value> - permix.group

User Management
/permix user <player> parent set <group> - permix.user

Admin session
/permix reload - permix.reload

Or simply use the permix.* permission to bypass that