List slash commands

[fyrye]

Is there a way to list slash commands created by addons outside of the Ace community as addons like Niagara, Rock, and DueceCommander, take care of them.
Though many addons arent supported by the above and have slash commands.
So im looking for a way to do /list and see a list of the commnads and their intended addon, and if possivle explination of the command, similar to /help.