Unenchanted is a very simple mod adding a very simple block: the Unenchanting Table.
The Unenchanting table allows you to transfer all enchantments from an item to a book at the cost of XP, however the original item is destroyed in the process! Each transfer will cost 4 levels per enchantment, with one additional xp level per level of each enchantment.
As of version 1.1.0, the xp costs are now fully configurable
