I parallels for IE 7 and Visual Studio .NET. I also do love classic, windows-based minesweeper and solitaire. I've tried a lot of them on mac but they are too cool or too feature-ful... which sounds stupid but it's true. I've been teaching myself with a bunch of books that require Visual Studio .NET so I ALWAYS have Visual Studio open in coherence. For IE 6 I use CrossOver and then I also use VMware for Ubuntu 7.