CherryOS

Macintosh users have long been able to run software that emulates a Windows computer within their Mac, allowing them to run Windows and all the applications that go with it. Here's an interesting Macintosh emulator. For $50, you can allow your PC to run Mac OS X at G4 speeds. You still need to purchase the Macintosh system software and applications, of course, but the idea is still intriguing. One of the arguments for software like this? It allows users to use the excellent Mac OS on cheaper PC hardware.

I'll be curious to see if this goes anywhere outside of the software and web development worlds.