OpenOffice 2.0 released
 

www.openoffice.org

It's an open-source alternative to MSOffice. Supposedly it's better than MSOffice. It's definately free-er than MSOffice.

The only downside I'm looking at is that, although you can open Office documents in OpenOffice, you can't do the reverse at this point in time. (This means that, if you use OpenOffice to create something then try to open it... at school or something, you're going to run into problems.) I did read somewhere that MS is planning on supporting OpenOffice file types, though.

Anyway, I suggest you check it out.