Oracle Corporation.

OpenOffice.org was an open-source office productivity suite that originated from StarOffice, a proprietary product developed by Star Division. Sun Microsystems acquired Star Division in 1999 and subsequently open-sourced the software in July 2000, releasing version 1.0 in May 2002. The suite offered applications for word processing, spreadsheets, presentations, graphics, databases, and formula editing, with its default file format being the OpenDocument Format (ODF).

Following Sun Microsystems' acquisition by Oracle Corporation, the development of OpenOffice.org experienced a slowdown and eventually ceased. Oracle then donated the project to the Apache Software Foundation in 2011, where it continues as Apache OpenOffice. A significant fork, LibreOffice, was created in 2010 by former members of the OpenOffice.org community due to concerns over Oracle's management. OpenOffice.org was primarily developed for Linux, Windows, and Solaris, and was distributed under the GNU Lesser General Public License.

The lineage of OpenOffice.org traces back to StarOffice, a commercial office suite initially developed by the German company Star Division starting in 1985. Sun Microsystems acquired Star Division in 1999, reportedly seeing it as a cost-effective alternative to licensing Microsoft Office for its employees. In July 2000, Sun announced its intention to release the StarOffice source code, leading to the official launch of the OpenOffice.org project in October 2000. The project aimed to provide a free and open-source office suite, with its first major release, OpenOffice.org 1.0, appearing in May 2002. The suite gained traction, becoming a notable competitor to Microsoft Office and the default choice on many Linux distributions. A key innovation was the development of the OpenOffice.org XML file format, which was later contributed to the development of the OpenDocument Format (ODF) standard.

After Oracle Corporation acquired Sun Microsystems in January 2010, the trajectory of OpenOffice.org shifted. Oracle's stewardship saw a reduction in development resources and a perceived decrease in commitment to the community. These changes, coupled with Oracle's management practices, led to significant discontent among the project's contributors. In September 2010, a substantial portion of the community departed, forming The Document Foundation and initiating a fork named LibreOffice in January 2011. Oracle eventually ceased active development of OpenOffice.org in April 2011. Subsequently, in June 2011, Oracle transferred the OpenOffice.org trademarks and codebase to the Apache Software Foundation, which now manages the project as Apache OpenOffice, relicensing the code under the Apache License.

OpenOffice.org offered a comprehensive suite of applications, including Writer for word processing, Calc for spreadsheets, Impress for presentations, Draw for vector graphics, Base for database management, and Math for formula editing. Its native file format was the OpenDocument Format (ODF), a standard it helped pioneer. The suite was designed to be cross-platform, with primary support for Linux, Microsoft Windows, and Solaris, and later expanded to macOS. It also featured OpenOffice Basic, a programming language akin to Microsoft's VBA, and supported various database connectivity methods like ODBC and JDBC. The project also supported third-party extensions, with a substantial repository available for users to enhance the suite's functionality.