To agree with a later commenter, OpenOffice does an amazing amount of different formats. There's this lovely thing (you've got to pay for it though) called VMWare that will let you run M$ programs on a linux box. Also there is Basilisk II that allows you to emulate a Macintosh. But not the OS X system.

And if you can help me find a job up there as a construction manager than I bring along unixronin who is indeed a linux Guru. He's been using linux before the 1.0 kernel.