iScreensaver Designer 

iScreensaver is the only single-machine solution that creates OpenGL, QuickTime, or Flash screensavers for Macintosh and Windows. Our authoring software works on both Macintosh and PC computers and either version will create screensavers for both platforms.iScreensaver is an application that allows you to create screensavers in a snap. The screensaver can contain static or animated content created with OpenGL, QuickTime, etc., and any type of audio, including multiple audio tracks. You can also add text and images that, in their turn, have multiple formatting options. It also enables you to use locking options, customize behavior and keys, and even password-protect your creations. What is more, you can also customize the screensaver installer and control panel including title, picture, about section web, etc.

Once you finish your creation you can get a preview from within the program. If it is your first time with this kind of program, you can download a sample from the developer's website to see how it works.

In addition to this, the program is extremely simple and easy to use, and offers a clean and beautiful user interface.

In short, iScreensaver is a simple but useful application for the creation of screensavers that definitely deserves a try.