Flip Clock is a cool little desktop clock application that showcases the time using animated split-flap cards, reminiscent of traditional airport information displays.
TreeSheets combines spreadsheet tools, mind mappers, outliners, personal information managers, text editors and small database utilities into an all-in-one office application.
ToDoList is a versatile task management tool that allows you to break down complex projects into manageable parts by repeatedly subdividing them, creating a hierarchy of simpler subtasks.
Cherrytree for Windows, Mac, and Linux is a free hierarchical note-taking application featuring rich text and syntax highlighting, storing data in a single XML or SQLite file. Zero-dependency portable version is also available.
Super Productivity is a versatile, free, multi-platform task manager and time tracking tool. As an Open Source program, it offers users the flexibility to customize and enhance its features according to their needs.
Evernote is a note management application that offers you a single place for the organization, easy input and quick retrieval of all types of notes and clippings.
VOVSOFT Tree Notes is an application for taking hierarchical notes designed to improve organizational efficiency and streamline information management.
CalendarTask (formerly DesktopCal Desktop Calendar) helps you manage appointments, to-do lists, schedules, and more without blocking access to your desktop icons.