Here the five you wanted:
1. Open Office Writer
--> Suite name: OpenOffice 3.0
--> http://www.openoffice.org/
2. AbiWord
--> http://www.abisource.com/
3. WordPerfect
--> Suite name: Corel WordPerfect X4
--> http://www.corel.com/servlet/Satellite/ca/en/Product/1151523326841
4. Star Office Writer
--> Suite name: StarOffice 9
--> http://www.sun.com/software/staroffice/
5. TextMaker
--> Suite name: Ashampoo Office 2008
--> http://www2.ashampoo.com/webcache/html/1/product_2_0238___USD.htm
Others:
LyX
-->http://www.lyx.org/
Google Docs Document
--> online word
--> http://docs.google.de/