Here’s MacWorld review of a great alternative to MS Office, Open Office, and not only is the software free to download and share with others, but the file format is also an ISO standard that is open to implement by other companies. Check out the WikiPedia’s article on Open Document
As a beginning business owner there is nothing like keeping your costs down during the start up phase.
Where does Open Office fit? When you do not have a lot of collaboration with others with your documents.