Freeplane - Freeplane is a powerful and free software for building mind maps.

docassemble - docassemble is a free, open-source expert system for guided interviews and document assembly.

vym - VYM (View Your Mind) is a tool to generate and manipulate maps which show your thoughts.

Knackly - Generate contracts, emails, or other documents of any complexity by automating your knack for doing...

Linked Ideas - A macOS/iOS apps to treat ideas as links of concepts.

HotDocs - Template-driven, automated document & form assembly software