OpenOffice writer (openoffice.org)
A great word processor with a little lack of design but if you just want to type for free it's the app for you.
PROS:
- Great budget program
- Lots of features
- there is a portable version at http://portableapps.com/apps/office/openoffice_portable
- supports:
Windows Linux RPM Linux DEB Linux 64 RPM Linux 64 DEB Linux IA64 RPM Solaris x86 Solaris SPARC Mac OSX Intel Mac OSX PPC
CONS:
- lack of user interface
- hasn't got that "fun" soul (you can't really have fun with it unlike other word processors
Prize wardrobe:

Best Project » OpenOffice.org
http://www.openoffice.orgBest Project for the Enterprise » OpenOffice.org
http://www.openoffice.orgBest Project for Educators » OpenOffice.org
http://www.openoffice.org