3D Ocean Sunset
The program is easy to install; just click the executable file. Basic settings allow you to adjust the sound, brightness, and tint of the images. The Sound dialog box lets you adjust the volume or play your own MP3 files to accompany the screen saver. This might be a good idea, because the "ocean" sounds seem more like static to me, while the bird cries seem harsh and electronic.
The demo version is good for seven days and includes text that appears on-screen periodically encouraging you to register (which you do by going into the Display Properties, Settings dialog box).