So far, I have seen only one person mention a Dremel set, and while I can't say I'm particularly surprised as the focus is on a machine shop set-up, I can say that in terms of small power tools, the Dremel (and associated bits) is just about unmatched.
Also, get several tubes of Loctite as bolts coming loose is not a good thing, just ask our elevator we built for this year! (Explanation: we're using 1 in. 80/20 and associated linear slides.Those slides are held by bolts going into a tapped hole in the 80/20. During WI, it was noticed that those bolts were coming loose, and because of the nature of the way we built it, the bolt heads can't be easily gotten at. Oops, there's a bit of a design flaw we never thought about during build.

Anyway, the solution was to take it apart and Loctite the bolts. Problem solved.)
Other than those two small things, I think that just about everything else has been touched upon (except for several power drills maybe?).