Here is the best alternative for MS Office.It is OpenOffice.org
Here is the product description:
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, OpenOffice.org also works transparently with a variety of file formats, including those of Microsoft Office, and the vendor-neutral OpenDocument standard from OASIS
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 open-source license, OpenOffice.org allows any knowledgeable developer to benefit from the source. And, because the native file format for OpenOffice.org is the vendor-independent OpenDocument open standard, interoperability is easy, making future development and adoption more certain.
Download it here: OpenOffice Download
