I found a tut that requires bit[PLUGIN] but I dont see it in the plugins page, ive also tried several on site searches, as well as google, is it maybe called something else? I think its for an inventory tutorial
http://www.scirra.com/forum/plugin-bitwise-operation_topic47702.html
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could it be that you mean this Tutorial?
scirra.com/tutorials/244/rpg-inventory-drag-and-drop
And below the first image is a link to this plugin:
scirra.com/forum/plugin-bitwise-operation_topic47702.html