OpenOffice is an office application suite available for a number of different computer operating systems. It supports the OpenDocument standard for data interchange as its default file format, as well as Microsoft Office '97-2003 formats - among many others. OpenOffice is based on StarOffice, an office suite developed by StarDivision acquired by Sun Microsystems in August 1999. The source code of the suite was released in July 2000 with the aim of reducing the dominant market share of Microsoft Office by providing a free, open and high-quality alternative to users. OpenOffice is a free software, available under the GNU Lesser General Public License (LGPL).
NeoOffice is a full-featured set of office applications (including word processing, spreadsheet, presentation, drawing, and database programs) for Mac OS X. Based on the OpenOffice.org office suite, NeoOffice has integrated dozens of native Mac features and can import, edit, and exchange files with other popular office programs such as Microsoft Office.