Love them or hate them, Windows computers run many applications that are, unfortunately, unavailable on your Mac unless you want to deal with an emulator. If you want to use some Windows applications from the comfort of your Mac without struggling with an emulator, then CrossOver Windows App Liberator for Mac is what your computer needs.
And for just $19.99, you can get a one-year subscription that will allow you to run Microsoft programs on your Mac as easily as native software.