GoodTask is described as '3 is a Powerful Task/Project Manager based on iOS Reminders & Calendars. You can use it as simple checklist to focus or as complex project management tool to get big things done' and is an app in the Office & Productivity category. There are more than 100 alternatives to GoodTask for a variety of platforms, including Online / Web-based, Windows, iPhone, Android and Mac. The best alternative is Joplin, which is both free and Open Source. Other great apps like GoodTask are Standard Notes (Freemium, Open Source), Google Keep (Free), Microsoft OneNote (Freemium) and Trello (Freemium).
Workflowy lets you organise your brain into easily manageable lists. It also works as a single-pane outliner with inline notes. It offers one-click hoisting (zooming into branches). The online version syncs with mobile apps.
Habitica is a free habit building and productivity app that treats your real life like a game. With in-game rewards and punishments to motivate you and a strong social network to inspire you, Habitica can help you achieve your goals to become healthy, hard-working, and happy.
Take your tasks anywhere with this feature-packed application. See tasks located nearby, add and complete tasks on the go, organize upcoming tasks, and sync it all seamlessly with Remember The Milk. Desktop app available for Pro users. Very good integration in GMail!
Get more done with the Google Tasks mobile app. Manage, capture, and edit your tasks from anywhere, at anytime, with to-dos that sync across all your devices. Integrations with Gmail and Google Calendar help you get tasks done—faster.
Marvin incorporates principles from behavioral psychology to help you beat procrastination, feel in control and finish your todo list. Marvin is specifically designed to help you get your tasks done and not just store them.
A simple but effective way to keep on top of your tasks, 10 languages. ToDoList is a rare form of task management tool, one that allows you to repeatedly sub-divide your tasks into more manageable pieces whilst still presenting a clean and intuitive user experience.