AbiWord is a free word processing program under the GPL which runs on Linux, MacOS, Microsoft Windows, and other operating systems. AbiWord is a product of SourceGear Corporation and other volunteer contributors.
The program features basic text formatting with style support but no table support at the moment. It has a wealth of import/export formats like RTF, HTML and LaTeX. The native file format is XML, so documents written with the program are a safe investment from the point of view of digital archiving.