Workflowy - A better way to organize your mind.
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.
Dynalist - Dynalist is a web app that lets you break down and organize your thoughts in the format of lists.
vym - VYM (View Your Mind) is a tool to generate and manipulate maps which show your thoughts.
Checkvist - A professional list-making tool. Minimalist, keyboard-centric online outliner and task management application. Free sharing, unlimited lists, cross-linking, free import and export. Markdown support. Created for geeks 🤓 and all keyboard lovers ⌨️
Freeplane - Freeplane is a powerful and free software for building mind maps.