The purple room's quilts are from Holy Simoly. They're part of a GORGEOUS set that I highly recommend. All the others are Maxis. The yellow room's are from BV. I think Miranda's is also from BV, but then in Freetime, they added some additional colors of it, so the blue room's.

If you want, I can dig up the name of a couple of creators on MTS2 whose bed covers I like. :) The Holy Simoly ones are to die for, though.