Microsoft To-Do - Task management tool
FiveNotes - One-click Mac menubar notes app with fives easily accessible notes.
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Jot menubar notes - Open-source freemium notes app for Mac menubar.
doo - A smart, simple app for reminders and to-dos
FlowNote for Mac - The simplest yet clever Mac menubar note.