Erica Sadun writes: "Apple's free developer tool collection contains many overlooked gems. These aren't limited to programming-specific utilities. Mac enthusiasts of all stripes and all experience levels can regularly find tools to help them enhance their day-to-day use of OS X applications. It's just a matter of knowing where to look. Take Quartz Composer, for example. It's a free utility that can bring new life and interest to your iMovie projects. In this article, you'll learn how to use your own pictures to create a simple but flashy animation." If you find this interesting I suggest you take a look at this article over at the Apple Developer Connection.