1)   Atmosphere Lite: Nature Sounds Generator 5.4
Bring the sounds of nature to your desktop. Choose presets such as tropical, thundestorm, nighttime, summer and many others or alternatively customize your own soundscape from the background and random sounds provided

 2)   Atmosphere Deluxe: Nature Sounds Effects Generator 5.4
Atmosphere is a sound generator that has many uses, primarily as a home sound environment generator and as a tool for creating custom nature CD's and ambient audio for professionals such as therapists, web developers.