Bag of holding: Stores 3 + n columns of inventory, when ` is pressed cycles any inventory columns to the right of the bag in and out of storage. It has some really neat uses, such as quickly swapping out part of your hotbar between sets of tools, or making the pocket crafting table more useful (store a few half-built machines as you create their parts, without cluttering up your inventory normally). Can be used when you have a machine's GUI open, unlike the various other bags from other mods.
There is also the parasieve. Inputting items or extracting items from a parasieve seems to input/extract from the block it is attached to instead, and you can connect up to 6 parasieves away from the actual block. Somewhat like a transvector interface, though a bit more limited (items only, needs to be connected to the block by a chain of 0 or more parasieves, probably only works with things that actually insert/extract items), but you can filter what sort of items it can interact with, too. It seems at least powerful enough to connect something to a ME storage bus.
Lacerators can damage mobs, similar to a low-damage attack turtle (even dropping experience, it seems).
