I have been at work late at night and had the radio in the kitchen turn its self on, or heard footsteps run down the hallway or pace back and forth, and have heard muffled voices and whistles at times as well. Freaked me out so bad one night I called on of my cop buddies and demanded he stay on the phone with me, and I took out the knife I carry with me and the mace (like i really could have used either of those if i had needed to while on the cell phone right, lol), and I took off outside running to my car.
Other times, at my parent's old house I would be reading in the library at night and sometimes books would fall off the shelves randomly - which couldnt have happened on their own since all were alighned neatly and pushed back on the shelves, and every now and then some of our fireplaces (when a fire was going) would all the sudden have huge flames for a moment then die back down to small ones. And doors would be open after you knew you just shut them.