JR
Hare Krishna
Shaivism does not believe in avataras. However atleast 19 divine manifestations are considered 'amshas' of Lord Shiva, Shri Hanuman being one of them. Please see in this link all these 19 avataras:
Avatars of Shiva | 19 Avatars of Lord Shiva
Avatars of Shiva | 19 Avatars of Lord Shiva