OpenOffice Calc

Also known as Calc, Apache OpenOffice Calc

spreadsheet part of the Apache OpenOffice software package

Key facts

Original author: Star Division (1985–1999)
Developers: Sun Microsystems (1999–2009), Oracle Corporation (2010–2011)
Initial release: 1 May 2002 ; 24 years ago ( 2002-05-01 )
Final release: 3.3.0 / 17 January 2011
Written in: C++ and Java
Operating system: Linux , Mac OS X , Microsoft Windows , Solaris
Platform: IA-32 , x86-64 , Previously supported: PowerPC , SPARC
Predecessor: StarOffice
Successor: LibreOffice , Apache OpenOffice
Standard: OpenDocument
Available in: 121 languages
Type: Office productivity suite

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Article

OpenOffice.org is an open-source office productivity software suite. It originated from the proprietary StarOffice, developed by Star Division, which was acquired by Sun Microsystems in 1999. Sun open-sourced the software in July 2000 as a free alternative to Microsoft Office, and released OpenOffice.org version 1.0 on 1 May 2002.

Following Sun's acquisition by Oracle Corporation, development of OpenOffice.org slowed and eventually ended. In 2011, Oracle donated the project to the Apache Software Foundation, which continues it as Apache OpenOffice,, with the most-recent version being 4.1.16, released on November 10, 2025. A fork of OpenOffice, LibreOffice, was created in 2010 by members of the OpenOffice.org community.