To view the images

To view a still picture (on linux) you can use xv, display, or even better gthumb. E.g

xv <filename>

To view a series of frames as an animation
playimages is a little program I wrote to play a series images. E.g.

playimages *.png

If it dosen't exsist on your system. You can get the source from playimages.tar.gz. It requires Qt3.

There was an old program called cave but it doesn't seem to work anymore.
cave anim.tif 0-25 to start cave with frames anim0.tif to anim25.tif running.