Musescore, a music software
Here comes the software we talk the other day at class. Musescore is a free-to-use software for Pc and Mac. I'm not sure if this is free in other platforms like android or iOs. With this software you can practise and write your own music for any instrument you like. And also you can sharp your composer's abilities! If you want to download or just know more about it, click here.