This is indeed an unfortunate name. The word 'closure' was, at first, used to describe a concept in programming: http://en.wikipedia.org/wiki/Closure_(computer_science).
Then Clozure and Clojure came along. Now, I can see how these two are related to the aforementioned concept, but I simply can't see what these 'Closure tools' have to do with the concept of closures. Yet the name would suggest that they do. Is there anybody from Google that would care to explain?
It's not quite as bad as PrototypeJS -- the most ironically named library ever. The whole point of it is to force Class-based bullshit onto the only pure Prototype-based language anyone uses. It's named after the concept it's designed explicitly to stamp out.
Note that the word closure has meaning in set theory and other areas of mathematics relevant to computer science. SICP explicitly avoids using what wikipedia calls a 'computer science closure' for this reason.
