Sort Safari bookmarks by last used

Hello,

Does anyone know of an app that will sort Safari bookmarks by the last time you selected them or the most often selected?

I am running Safari 7.0 on Mavericks and have the Favourites Bar active where I keep my most used bookmarks under subject folders but would love the folders to automatically re-order according to how often / or recently I used them.

I don't like the Top Sites layout, perhaps some way to automatically display these in a drop down bookmark menu?

Thanks.