OpenOffice

Yes, it is free. But.....

Openoffice can open Mircosoft office product and not the other way. In another word, if you create a file in openoffice, you can't open in MS office.

I got a file from Openoffice and in order to modify it, i have to download the entire Openoffice program. Install it and convert it to office format... JUST FOR 1 FILE! *faint*

Dot.Dot.Dot.