To create, as a community, the leading international office suite that will run on all major platforms and provide access to all functionality and data through open-component based APIs and an XML-based file format.
Features:
OpenOffice.org Calc
OpenOffice.org Draw
OpenOffice.org Global
OpenOffice.org HTML Editor
OpenOffice.org Impress
OpenOffice.org Math
OpenOffice.org Setup
OpenOffice.org Writer

More info:
hxxp://www.openoffice.org/
Size 50MB.