Relax Melodies - Relax Melodies is the leader in personalized relaxation and sleep assistance.
Moszen - Moszen is a free web service that provides ambient sounds from natural environments to help you relax and avoid stress in your daily life.
Natura Sound Therapy - For iPhone, iPad, iPod Touch, Android, Kindle Fire (PC and Mac Version Coming Soon!) Your paradise of blissful relaxation is just one app away! The original and ever popular Natura Sound Therapy is now mobile, just like you!
Noises Online - Premium masking sounds
Ambiance - Ambiance© for your Desktop or Mobile Device
Sleep Bug - Sleep Bug is the name of an ambient sound mixer that generates a wide range of scenes and music using the random sound effects.