LibreOffice is a free and open source office suite, developed by The Document Foundation.
LibreOffice uses the international ISO/IEC standard OpenDocument file format as its native format to save documents for all of its applications (as do its OpenOffice.org cousins Apache OpenOffice and NeoOffice). The OpenDocument file format is now also supported by all major competing office suite applications (proprietary and open source). LibreOffice is also compatible with other major office suites, including Microsoft Office, through a variety of import/export filters. The file formats of Microsoft Office are well supported, though some layout features and formatting attributes are handled differently in the application or are not entirely supported in the filters. LibreOffice is available in over 110 languages and for a variety of computing platforms, including Microsoft Windows, Mac OS X 10.4 Tiger or newer, and Linux. It is the default office suite of most popular Linux distributions.
Between January 2011 (the first stable release) and October 2011, LibreOffice was downloaded approximately 7.5 million times. During 2012, the office suite was downloaded about 15 million times.