KeyNote NF is a free and portable note-taking application that can also double as a simple digital diary. It’s a modern update of the classic KeyNote, enhanced with new features while keeping the same lightweight and user friendly feel.
Golden Rules Organizer is a free and portable personal information manager. It is a personal organizer you can use to manage your daily or weekly tasks, projects, activities, contacts, schedules, plans and more. It could also be used as a personal diary or to simply keep notes in an ordered structure.
iDailyDiary is a free portable diary software that can be used as a personal digital diary or note-taking journal to log daily thoughts, ideas, and experiences. It features a built in rich text editor that allows users to insert images, URLs, hyperlinks, and formatted text. Diary entries can also be exported to HTML format, making it possible to publish or archive your diary entries as web pages.
MemPad is a free note-taking tool that can serve as a Portable Diary. It allows you to create a tree like note-taking structure, making it easy to organize daily entries, ideas, or project notes. It comes packed with features to enhance productivity and note organization, including search, drag-and-drop, copy, cut, paste, undo, inserting dates and times, internal file links, external web links, and support for environmental variables to run programs from file links.