Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Commitments - Commitments is a simple, lightweight to-do app that lives in your menu bar, works offline, and never collects your data—your tasks are yours alone.
BeforeSunset - Catch beautiful sights, finish your work before sunset.
Check Check Check - Yes, another to do app. This time living in your menu bar. Add your tasks, add some tags and go to work. No projects, no GTD, no inbox, no excuses. Just Check Check Check!.
Reminders Menu Bar - Simple macOS menu bar application to view and interact with reminders. Open Source and using Apple Reminders as a source.
Chunk - Chunk is your time-blocking command center. Plan tasks with precision, get fullscreen alerts, and stay in flow all day. Built for focus, with calendar integration that fits your workflow.