Mine are
Potato ricer, especially since Nigella told me not to bother peeling spuds, the skin stays in the ricer and we get lovely mash.
A victorian clothes hanger for saucepans (ok, so DH bangs his head on the bloody thing) saves a whole cupboard from being used for saucepans. I also hang my bananas up there.
Panasonic breadmaker (going damp thinking about it, used every day)
a utensil hanger thingy for the wall, with butchers hooks, ours is packed with stuff I use every time I cook.
An old fashioned (DH mothers) mixer thingy with 2 whisk jobbys.
Not an accessory but a sink with a small one in the middle.