I learned how to switch between applications with Alt + Tab as a young Windows user long ago. As soon as I got my Mac, I quickly realized Command + Tab did the same thing. But it wasn’t until recently I learned how to switch between application windows in Mac OS X:
Command + ` (Backtick)
There’s no flashy menu that pops up, but it works like a charm for cycling through application windows instantly. Before now, I always used the gesture on the trackpad for show all application windows (it’s also a functional button), which is still nice if you have many application windows to choose from and you don’t want to cycle through them, or you just want to see what’s open.
I wouldn’t be surprised if the same functionality existed in Windows 7 as Alt + `.