If the anime was never completed, Then you're in luck. You can continue the story by reading the completed manga. This list has basically the same rules as a couple of my other ones, includes anime originally based on a manga, no...
These anime aren't available in English in any way, shape, or form....or in the case of some, the full series isn't. (Note: Some of these anime may be available RAW or subbed in a language other than English. Also, only completed...