A plugin for a /commands command to show available commanda via Permissions?

Exactly what the title says, I'd like a plugin so when a player uses /commands they can see what commands they're allowed to use using PermissionsEx.

Is this possible? Thanks.

 

It was possible in HMod, however, not in Bukkit.
Instead, you can setup a "Help" plugin to show players what commands they have access to.

I recommend using HelpPages; it allows you define help pages in a config file, then specify which permission-groups get access to each page. For example, let's say you have 3 groups called "Default," "Moderators," and "Admins." You could make page 1 and 2 basic commands everyone, including "Default"s, have access to. Page 3 and 4 would be "Moderator" specific commands, and 5 would be "Admin" only commands.
Then, using the config file in HelpPages, you could allot "Default"s access to pages 1 and 2, "Moderators" access to pages 1-4, and "Admins" access to pages 1-5.