Very little...

clothespins
rope
handcuffs (not soft cuffs, police-style locking metal cuffs)
candles
and we improvise things for thwacking - wooden spoons, sandals, rulers, belts... I think 2 wooden spoons from his kitchen have met their demise over my ass.
oh, and he'd count carabiners, I'd rather not...that's a vicious nipple clamp.

nothing that's specifically a sex toy, nothing from a sex shop. It's all very subtle, in fact my clothspins recently had to start doing double duty when I realised that I did in fact have a clothsline in the backyard!