What are some alternatives?
Fortay - Use your best people to scale your company's culture easily
MadCap Flare - Documentation for Any Audience, Language or Format
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.
Zmags - Zmags provides solutions create and publish web experiences instantly.
Adobe Acrobat DC - Make your job easier with Adobe Acrobat DC, the trusted PDF creator. Use Acrobat to convert, edit and sign PDF files at your desk or on the go.
SPIP - Système de Publication pour Internet