imovie effects

Visual SlideShow Mac: Make SlideShow with cool effects based on Mootools Script!

Movie transition effects for Quicktime

Here is a set of brushes made for cool debris/explosion effects

Brush set of smoke effects

Webcam Video Effects for Photo Booth & iChat.

Add night effects to your video footage.

Generates breathtaking 3D spatial effects.

Screen effects for presentations and more

Advanced Effect Maker create Flash and JavaScript effects.

It let you apply effects to 24bit images.