Laurent Cozic
Simple Date and Time
FreeDisplay the date and time on your desktop.
WindowsDay Planner - Calendar
FreeManage your schedules and events using a day planner and calendar widget.
WindowsGeneric Countdown Timer
FreeSet an alarm and countdown timer.
WindowsJoplin
FreeJoplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks.
Android