Are there any two companies cooler than Google (NASDAQ:GOOG) and Apple Computer (NASDAQ:AAPL)? Sure. If you check out the Rule Breakers newsletter service, you can probably find some pretty amazing companies working on next-generation applications like robotics in the operating room, or making small things do big things in the booming field of nanotechnology. But when you get around to gargantuan-sized companies, it's hard to get any cooler than Google and Apple.

Google and Apple were some of the market's biggest winners in 2005. Their share prices more than doubled, as the graph below shows.