My Daily Planner - Organize your day with pen & paper. Free printable template.
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Amazing Marvin - Customizable personal productivity tool
Any.DO - The #1 task management app used by over 11 million people globally, Any.do is your free mobile and online task manager for Android, iPhone, Web and more.
Plan - Plan is a better way to organize.
Microsoft To-Do - Task management tool