Alternatives to Remember The Milk

Collaborative to-do list app

Encrypted to-do list, habit tracker, journaling, life-tracking and notes app

CalDAV-compatible task management app

To-do list

Reminder, planner & calendar

Simple menu bar app to view and interact with reminders

To-do list and time tracker

Calendar for professionals and teams

App for note taking, organising, task lists, and archiving

Scheduling application focusing on organisation

Calendar for productive people

Note taking app