Autonomous
Part of speech: adjective
Definition: Self-governing. Governing independently. Acting on one's own or independently; of a child, acting without being governed by parental or guardian rules. Used with no subject, indicating an unknown or unspecified agent; used in similar situations as the passive in English (the difference being that the theme in the English passive construction is the subject, while in the Celtic autonomous construction the theme is the object and there is no subject).
Example sentence: One of the great things about the Roomba robot vacuum cleaner, which my company iRobot designed, is that it's too cheap not to be autonomous.
Self-directed
Part of speech: adjective
Definition: Directed, independently by oneself without external control or constraint