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.
Swift To-Do List - Swift To-Do List is software that helps the user stay organized with advanced planning and lists. The software is developed by Dextronet, a Prague based company which was founded in 2004 by Jiri Novotny... read more.
vym - VYM (View Your Mind) is a tool to generate and manipulate maps which show your thoughts.
OmniOutliner - OmniOutliner is a writing app for collecting information, outlining ideas, adding structure to any sort of writing.
Freeplane - Freeplane is a powerful and free software for building mind maps.