Bukkit

Image for a moment, you have just spent the better part of an hour mining in the deepest recesses of the world you know. You return to the surface, to sort and smelt your various precious ores only to realize that like me, you despise opening furnaces. Now, a simpler way of life has arrived. Just hold that gold ore and beat your fist against the furnace. BLAM, it's now inside. Forgot to leave coal in? Smash that rock against the furnace too. BLAM, it's now inside as well. Any item that can be smelted or used as fuel can now be automatically inserted. Oh, but wait, the furnace is done and sitting idle? Strike it again to shake out any completed bars. You'll never open a furnace GUI again.

Features

• All functionality is based on clicking with different items
• Right click with smeltable or burnable items to automatically add to the furnace
• Left click to eject completed items to the ground
• Automatically ejects any output that will prevent smelting of a new item
• Optionally prevents mixing of subtypes, e.g. coal, saplings, logs
• Obeys vanilla maximum stack size limits
  
  

I recently decided to cut down on most of the complexity, as such protection is hardcoded in. If LWC/Lockette/etc is enabled, this will obey it. No config, works for anything you can smelt and ONLY coal/charcoal (no burning your jukebox by accident). No configs, no permissions. Works right out of the box.