Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
Lifetick - Lifetick is an online Goal Setting application with a stylish, easy to use interface.
Asana - Asana project management is an effort to re-imagine how we work together, through modern productivity software. Fast and versatile, Asana helps individuals and groups get more done.
Beeminder - Beeminder
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Joes Goals - Joe's Goals is an online goal-tracking website. 100% Free. No Download Required.