OpenOffice.org
The interface is similar to that of MS Office, and even advanced Office users will find almost everything they're used to: templates, collaborative features (versions, recording changes), macros, and even a programming language. OOo, as it's known, lets you open and save documents in formats as diverse as MS Office formats, PDF, HTML, and XML. It can also import files from those formats, as well as WordPerfect and others. However, it normally saves files in the open-standard Oasis OpenDocument XML format, for maximum compatibility with other applications.
Download: (Windows/Mac OS X)
http://download.openoffice.org/2.3.1/index.html
The interface is similar to that of MS Office, and even advanced Office users will find almost everything they're used to: templates, collaborative features (versions, recording changes), macros, and even a programming language. OOo, as it's known, lets you open and save documents in formats as diverse as MS Office formats, PDF, HTML, and XML. It can also import files from those formats, as well as WordPerfect and others. However, it normally saves files in the open-standard Oasis OpenDocument XML format, for maximum compatibility with other applications.
Download: (Windows/Mac OS X)
http://download.openoffice.org/2.3.1/index.html