...as I imagined the skeletons, the weapons they carry, if any, will vary. Some may take up weapons that they used in life, others might pick up whatever is handy, still others won't use any at all and simply use their hands or broken/sharpened arm bones.
Also, thanks to a rather disturbing thought I had last night, I can also imagine two or more skeletons having gotten tangled together, rib cages interlocked or some such, and moving/attacking much like some kind of horrific bone-spider. 
Let's just say, if you can imagine it, it can probably happen. 