Best Free GIF Animator

A picture is worth a thousand words. If this is true for an ordinary static picture then what about a picture that contains motion or animation with a lot more content in a limited space?

A GIF file can contain a single image, but to animate an image it will need at least two or more images/frames combined, which can then be displayed for a few milliseconds successively with animation effects. The best free GIF animator certainly makes this process much easier.