Feng Office - Feng Office is a commercial Open Source web based solution aimed to enhance collaboration and productivity
TheRightMargin - TheRightMargin is a smart writing tool.
LibreOffice - Free office suite, open source, and compatible with .doc, .docx, .xls, .xlsx, .ppt, .pptx files. Updated regularly – download for free. Originally based on OpenOffice.org.
Writefull - Writefull provides you with the tools you need to improve the quality and consistency of your writing.
Redmine - Flexible project management web application
Analyze My Writing - Analyze My Writing is an online text content and readability analyzer.