Beeminder - Beeminder
Freeplane - Freeplane is a powerful and free software for building mind maps.
Lifetick - Lifetick is an online Goal Setting application with a stylish, easy to use interface.
Linked Ideas - A macOS/iOS apps to treat ideas as links of concepts.
Habitica - Habitica is a free habit building and productivity application.
vym - VYM (View Your Mind) is a tool to generate and manipulate maps which show your thoughts.