OpenOffice.org is an open source office software suite for word processing, spreadsheets, presentations, graphics, databases and more. OpenOffice is a free and open source match for MS Office suite and it is
available in over 100 languages and works on all common computers. It stores all your data in an international open standard format and can also read and write files from other common office software packages, including files created in MS Office applications, such as MS Word or Excel.
More information: OpenOffice website