Lifetick - Lifetick is an online Goal Setting application with a stylish, easy to use interface.
Freeplane - Freeplane is a powerful and free software for building mind maps.
Beeminder - Beeminder
Linked Ideas - A macOS/iOS apps to treat ideas as links of concepts.
Joes Goals - Joe's Goals is an online goal-tracking website. 100% Free. No Download Required.
vym - VYM (View Your Mind) is a tool to generate and manipulate maps which show your thoughts.