Here you have links to BANKS OF FREE IMAGES, MUSIC, SOUND, ICONS, VIDEOS AND MORE:  

• https://cedec.intef.es/bancos-gratuitos-de-imagenes-videos-y-sonidos/

• http://recursostic.educacion.es/bancoimagenes/web 

• https://www.flickr.com/ 

• https://pixabay.com/es/ 

• https://www.shutterstock.com/ 

• https://soundcloud.com/

• https://silhouette-ac.com/ 

• https://www.freepik.es/

• https://skitterphoto.com/

• https://unsplash.com/