Master class by Hans Zimmer: https://www.masterclass.com/classes/hans-zimmer-teaches-film-scoring?utm_source=Paid&utm_medium=Facebook&utm_term=Aq-Prospecting&utm_content=Link&utm_campaign=HZ

Also, Music production

https://www.audiotool.com/

Assisted music composition

NSynth

http://www.wekinator.org/

Algorithmic music composition

http://tinyrave.com/