My resistance band. That and a nice patch of floor to work with, and I'm all set!
EDIT: Sorry I just read what you said about resistance bands.... I guess I don't have much equipment except body weight - what I normally use. That and the beams on my balcony for rowing exercises.
I like doing 'the firm' dvd's I have 5 of them and even though they are older they keep me sweating. Of course I don't have the official box or weights but I make do and am starting to see results (again lol)
My hula hoop.. It may not be a serious workout or anything, but it motivates me to get off my behind. When I'm watching TV, I won't just veg out and sit there, I'll hula hoop... In fact, I'm looking to buy a weighted one so it gives me a better workout.