Apache OpenOffice

Apache OpenOffice is a open-source office productivity software suite developed by the Apache Software Foundation. It was created as a successor project of OpenOffice.org, itself a successor to StarOffice. It is also the designated successor of IBM Lotus Symphony. The suite includes applications for word processing (Writer), spreadsheets (Calc), presentations (Impress), vector graphics (Draw), database management (Base), and formula editing (Math). It supports the OpenDocument format and is compatible with other major formats, including those used by Microsoft Office.

Apache OpenOffice is developed for Linux, macOS and Windows, with ports to other operating systems. It is distributed under the Apache-2.0 license. The first release was version 3.4.0, on 8 May 2012. The most recent significant feature release was version 4.1, which was made available in 2014. The project has continued to release minor updates that fix bugs, update dictionaries and sometimes include feature enhancements. The most recent maintenance release was 4.1.15 on 22 December 2023.

Difficulties maintaining a sufficient number of contributors to keep the project viable have persisted for several years. In January 2015, the project reported a lack of active developers and code contributions. There have been continual problems providing timely fixes to security vulnerabilities since 2015. Downloads of the software peaked in 2013 with an average of just under 148,000 per day, compared to about 50,000 in 2019 and 2020. As of January 2025, the Apache Software Foundation has classed its security status as "amber" with multiple unfixed security issues over a year old.