Bibliotecas sonoras

http://www.soundstosample.com/

http://www.freesfx.co.uk/

http://www.freesound.org/

http://www.stockmusicsite.com

http://www.sound-ideas.com/sfxmenu-land.html

http://www.grsites.com/archive/sounds/category/4/

http://www.therecordist.com/free-sfx