well 602ProOffice, is shareware, although, if you can do without the M$ access clone, you get a free lifelong licence, not sure about companies though,
Openoffice on the other hand is freeware, and opensource GPL too, this is a big difference, because companies can use it, and if you have somebody competent enough, you can modify the source code too, so long as you are prepared to distribute the new source for free also.
I hope you enjoy those, if you want an alternative to M$ word that costs and has full support and so on, then go to the Sun Microsystems site and get StarOffice, very similar to openoffice, except that it's made by Sun, so they charge for it, and they support it.