1. Joe's Goals is an online goal-tracking website. 100% Free. No Download Required.

  2. Take on good habits and break bad ones

  3. Horizon is a realtime, open-source backend for JavaScript apps.

  4. The intentional living app

  5. SetMore is a free online appointment scheduling software which helps you book and manage appointments via Web, Android and iOS applications

  6. User Research Scheduling

  7. Productivity, meet creativity.

  8. Habit, task & goal tracking + quantified self

  9. World’s Friendliest To-Do List App

  10. QOwnNotes is a free plain-text notepad with markdown support for Linux, Mac OS X and Windows, that works together with ownCloud Notes.

  11. Keyboard focused, hackable TODO app.

  12. Todo.ly is an intuitive and easy to use online Todo list, and Task Manager. It helps you to get organized, simplify your life, and to get things done. Create todo lists, and manage them online from anywhere.