Wired has a nice list of Apple's most notorious flops, including the Newton, the Macintosh TV, and the Lisa.
It's a short, decent list, but I'd argue that the Apple IIc was actually reasonably successful; why they didn't list the disastrous Apple III (or the thermal-paper SilenType printer that went with it) in its place, I don't know. Maybe the Apple III was so bad that Wired blocked it from memory.
Or PowerCD, anyone?
Labels: apple, gadgets, geekery, history