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.
It suits teams producing structured XML content with DITA or related architectures. Authors, reviewers, and publishers needing reuse, workflow, and repository connections can use its desktop tools.