Todo.txt - Track your tasks and projects in a plain text file, todo.txt. A todo.
Lifetick - Lifetick is an online Goal Setting application with a stylish, easy to use interface.
Task Coach - Task Coach is a simple open source todo manager to keep track of personal tasks and todo lists.
Beeminder - Beeminder
Strikethru - Strikethru is a kind of to-do list notebook for managing work lists and staying updated with the important tasks.
Joes Goals - Joe's Goals is an online goal-tracking website. 100% Free. No Download Required.