OxygenOffice Professional (formely know as OpenOffice.org Premium) is a free and open source enhancement of official OpenOffice.org plus some Extras for you to use. The Hungarian Native Language Team has modified the source of OpenOffice.org and bundled lot of extras with it.
OpenOffice.org the product is a multi-platform office productivity suite. It includes the key desktop applications, such as a word processor, spreadsheet, presentation manager, and drawing program, with a user interface and feature set similar to other office suites. Sophisticated and flexible, OxygenOffice Professional also works transparently with a variety of file formats, including those of Microsoft Office.
OpenOffice.org is available in over 65 supported languages with more being constantly added by the community, OpenOffice.org runs stably and natively on Solaris, Linux (including PPC Linux), Windows, Mac OS X (X11), and numerous other platforms. Our porting page lists the platforms (ports) that OpenOffice.org can run on.
Written in C++ and with documented APIs licensed under the LGPL and SISSL Open Source licenses, OpenOffice.org allows any knowledgeable developer to benefit from the source. And, because the file format for OpenOffice.org is XML, interoperability is easy, making future development and adoption more certain.