SuperNotecard - Introducing SuperNotecard. SuperNotecard is an online writing tool that features virtual notecards to help arrange facts or scenes, track details, organize paragraphs, and clarify your composition process.
Markdown Preview for (Neo)vim - Preview markdown on your modern browser with synchronized scrolling and flexible configuration.
vym - VYM (View Your Mind) is a tool to generate and manipulate maps which show your thoughts.
Previm - Vim plugin for previewing Markdown and Mermaid in browser window.
Freeplane - Freeplane is a powerful and free software for building mind maps.
vmd - Preview markdown files in a separate window. Markdown is formatted exactly the same as on GitHub.