It is a Java-based app that runs on Windows, Linux and macOS that provides an amazing amount of rich text formatting options for sticky notes, auto-roll up notes, protection and encryption of notes, alarms, colours, attaching images or files, and much more. Although you could use it for organising masses of notes into groups and subgroups, it really shines at having quick reference notes, checklists, to-do list and reminders readily available on your desktop.
GloboNote – a feature-rich, free and open-source sticky notes application
