One, that I couldn't believe that I found in the real world (at a local junk shop), is the little gas torch the Jawas used to put R2's restraining bolt on.
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Holy crap, I didn't even realize that was used in the movie! Never paid close attention to this scene. These were sold at Radio Shack, I bought one back in maybe '98 for an art project I was tinkering with. I think it's still sitting in one of my tool boxes. That's so cool, thanks for pointing this out!