Softmaker, a german software company, is giving away their Office 2008 for free and donating 10 cents per download for charity projects.
See here: www.loadandhelp.de/home-en.html
You need to provide a valid mail address to receive your free serial.
[li]TextMaker 2008, the friendly, full-featured word processor[/li][li]PlanMaker 2008, the reliable, full-featured spreadsheet[/li][li]SoftMaker Presentations 2008, an alternative to Microsoft PowerPoint[/li][li]Unrestricted software, can be used perpetually[/li][li]Seamless compatibility with Microsoft Office[/li]/ul
Another possible advantage: Much smaller than Open Office.
The free download is available until the end of this year.