Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Xmind - Xmind is a brainstorming and mind mapping application.
Todoist 10 for iOS - A completely new Todoist for iOS
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
Microsoft To-Do - Task management tool
Coggle - Coggle is a simple, beautiful, powerful way of structuring information.