The Brainstormer, a neat app for random word/concept combinations for inspiration for stories etc.
I remember years ago I read an essay about how a story takes many more ideas than people realize. And it's true, if you look closer at the very best books you have read, they are probably full of many, many ideas which are each one delightful. (For example take some of the best books by Alan Moore, Neil Gaiman, Iain Banks, Terry Pratchett, Grant Morrison... (funny enough, all Brits) Tim Powers, William Gibson (not Brits).)
So perhaps one spin of this wheel can make a start of a drawing or short story, but maybe several spins, all combined, could made a better basis for a novel?