OpenOffice.org is a multiplatform and multilingual office suite and an open-source project. Compatible with all other major office suites, the product is free to download, use, and distribute. OpenOffice.org is sponsored by Sun Microsystems, which is the primary contributor of code to the Project. Over 180,000 people from every nearly every curve of the globe have joined this Project with the idea of creating the best possible office suite that all can use. They do so under the auspices of "open source."
OpenOffice原是Sun公司的一套商业级Office软件－StarOffice，经过Sun公司公开程序码之后，正式命名为OpenOffice发展计划，并由许许多多热心于自由软件的人士共同来维持。让大家能在MS OFFICE之外，还能有免费的Office可以使用。OpenOffice是个整合性的软件，里面包含了许许多多的工具，其功能绝对不比微软的MS Office还差，不但可以有Word一样的字处理，制作简单的图形，更有功能强大的图表功能，也能编写网页，还可以做出MS Office中很难处理的数学符号等等，支持了XML、微软的doc、Excel、ppt文件等格式。
Download: OpenOffice.org 2.2.1 (Windows)
Download: OpenOffice.org 2.2.1 (Linux)