Apache OpenOffice - Freeware version of Microsoft Office, open-source office productivity software suite. It descends from OpenOffice.org & IBM Lotus Symphony. Apache OpenOffice contains a word processor (Writer), spreadsheet (Calc), presentation app (Impress), drawing app (Draw), formula editor (Math), & database management app (Base). Its default file format is the OpenDocument Format (ODF). As of Jan 1 2014, OpenOffice has been downloaded over 85m TIMES for all versions.
Why use Apache OpenOffice? Apache OpenOffice is the leading open-source office software suite for word processing, spreadsheets, presentations, graphics, databases and more. It is available in many 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 in Microsoft and iWork office suite formats. It can be downloaded and used completely free of charge for any purpose.