Purp - A smart to-do list and goal tracker app
Xmind - Xmind is a brainstorming and mind mapping application.
Nirow - Habit tracking: Automated, Siri-ed, Calendar-ed, and More!
MindManager - With MindManager, flexible mind maps promote freeform thinking and quick organization of ideas, so creativity and productivity can live in harmony.
Things - Things is an easy to use task manager.
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.