Android: MegaSound is a free utility that lets you set custom notification sounds for each app on your phone. You can have one alert for an incoming SMS, another for a new email, another for Hangouts ...
NASA has been going through its audio archives and come up with a selection of what it’s calling “historic and interesting sounds” that can be used as ringtones or computer notification noises.
Results that may be inaccessible to you are currently showing.
Hide inaccessible results