Xmind - Xmind is a brainstorming and mind mapping application.
vym - VYM (View Your Mind) is a tool to generate and manipulate maps which show your thoughts.
Mindomo - Easy-to-create and share mind maps, concept maps, task maps and outlines. Mind mapping software for Web, Desktop, iOS and Android. Mind map with us for free!
Freeplane - Freeplane is a powerful and free software for building mind maps.
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.
Docear - Docear