HelpNDoc
7.4#3 in help authoring tools€99 one-timeFree planAPISelf-hostedWindows
VisitHelpNDoc suits Windows users who need to create documentation for personal or commercial use. Its named and floating paid plans provide different publishing formats, while the free Personal Edition excludes commercial use.
HelpSmith suits Windows users who need to author help content in several formats from a shared source. The Ultimate Edition may fit teams using version control or external translation tools.