Windows only: Portable note-taking and outlining application The Guide organises your notes and projects complete with rich text in a hierarchical view. The Guide has a similar feature set to previously mentioned ActionOutline Lite, lacking the ability to use tabs but making up for it with lighter resource usage, no restrictions on sub-items and the great price tag of free. Once installed, the preferences panel has a setting for switching the application into portable mode, which stores all settings in an INI file instead of the registry so you can copy the entire folder to a USB drive. Enabling icons and checkboxes can be done in the preferences pane, and icons for nodes can be changed through the context menu. The Guide is a free download for Windows systems only. Thanks MarsalaAnteater!