Support Hero - Educate your customers through self-help support
Google 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.
SkipFlag - AI knowledge base that builds itself from your communication
Microsoft Word - Microsoft Word is a commercial word document processor for Windows.
TheBrain - TheBrain: The Ultimate Digital Memory
Apache OpenOffice Writer - Open-source word processor of the Apache OpenOffice suite.