The rainbow line above and the counting image below are examples of animated
GIFs.
The counting image was created using the five images
below. Dedicated animated GIF editors include: Gif Construction
Set (PC) and
GifBuilder (MAC). Some image editing software such as Fireworks, Image Ready (now a
component of Photoshop) and Paint Shop Pro
come with animated GIF tools.
More examples: an animation
created by a student in a previous class and a splash
screen created in Fireworks where the animation occurs only once
(loop=1.)
The counting image was created using the five images
below. Dedicated animated GIF editors include: 
