Shareware

Dream Aquarium :

- A realistic aquarium screensaver for Windows, Mac and Linux.
Idle Time Software :

- Specializing in cinematic screen savers. Includes aerial views with realistic flight animation and engine audio. Mac and PC.
ScreensPro :

- Offers high definition animated screen savers for Windows and Mac. [Subscription required for full access]
VideoScreenSaver :

- Can play video files, including DivX and Mpeg. Supports creating a playlist which can operate while the screen saver is running. Demo version available.