What are some alternatives?
When comparing Word Online and AbleWord, you can also consider the following products
Apache OpenOffice Writer - Open-source word processor of the Apache OpenOffice suite.
AbiWord - AbiWord is a free software word processor.
LibreOffice - Writer - Open-source cross-platform word processor.
Mellel - Home Page for Mellel: The word processor of choice for scholars, writers and long document writing. for Mac OS X and iOS.
Google Drive - Docs - Create a new document and edit with others at the same time -- from your computer, phone or tablet. Get stuff done with or without an internet connection. Use Docs to edit Word files. Free from Google.
Microsoft Word - Microsoft Word is a commercial word document processor for Windows.