Microsoft To Do – was Wunderlist.
TickTick.com – Todo list, checklist and task manager app for Android, iPhone and Web. Join millions of people to capture ideas, organize to-dos, and make the most of your life with TickTick. Available for free, syncs across iOS, Android, Mac, Windows, Web and more.
Any.do – To do list app with Calendar, Planner & Reminders | Any.do 20+ Million rely on Any.do to Stay Organized. It’s the world’s best to do list app with Calendar & Planner. Free on iOS, Android, Windows, Mac, Online & more.
RememberTheMilk.com – Online to-do list and task management. Remember The Milk is the popular to-do list that’s everywhere you are: from your phone, to the web, to your Google apps, and more. Used by millions worldwide.
Habitica.com – Gamify Your Life. Habitica is a free habit and productivity app that treats your real life like a game. Habitica can help you achieve your goals to become healthy and happy.
Toodledo.com | Online To Do Lists, Task Manager, Note Taking & More. Toodledo is a popular and powerful online productivity tool. Manage your to-do list, take notes, track habits, and organize ideas into outlines and lists.
TeuxDeux.com – What deux yeux have teux deux teuxday? If you like making to-do lists, you will love TeuxDeux. The idea was to build a bare-bones, but visually compelling and highly usable to-do app.
OmniFocus for Mac is a great app for task management.