Microsoft has announced a free, 30-day trial of Microsoft Office For Mac 2011. It includes Mac OS X versions of Word, Powerpoint, Excel, and Outlook
A full 900MB trial of Microsoft Office for Mac can be found at http://www.microsoft.com/mac/trial . After 30 days you’ll be prompted to purchase the software, which costs US$119.99 for the student version, $149.99 for the family pack, and $199.99 for the business version.