There is a barrel editor and someone on one of the other forums made an editor that only works with a specific barrel in solitude. I found the one in solitude to work better. But can't remember where I found it.
In short there are very few actual mod editors for Skyrim unless you have the game on PC and have it up to date with current patch. Other then that like TwiztidMajik
posted there is only an editor that allows you to place items into a barrel for pick up.