Yes you can. The core muscles (of which the abdominal muscles are a part) are instrumental and used in basically every exercise we perform (particularly free weight or body weight). As the important link between the lower body and the head, these muscles are “exercised” and therefore “toned” in their daily chores such as stabilizing and transferring power from the ground up.
As for specifically targeted exercises to tone the abdominal muscles, there are TONS of them that do not involve crunching. Actually, too many to even list here.