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SoftMaker donates € 0.10 for every successful download to well-chosen development and charity projects on betterplace.org
This office suite often (in my experience) has better MS Office compatibility than OpenOffice. The best part is that this office suite supports making itself portable so you can easily run it from a usb key or cdrom (think WinPE/BartPE/UBCD4WIN).
So go download and help some people (yourself included) out!
Cheers