From time to time I mess around with the animation tools in my Painter software. I've posted a few examples of these experiments on this site, and the links to them can be found below.
short 'cat and mice' clip - Feb '07
monkey animated gif - Jan '06
naked walking man clip - Feb '04
'fly by' animation clip - Oct '03
'plate tectonics' flipbook gif - Oct '00
bouncing 'Orley' gif - May '00
animated newspaper gif - May '00