Anyone got some decent imaging software ?

I've got a new avatar I wanna upload, it's an animated Gif file, but when I upload it, I get the message :
"That image is too large. The maximum dimensions are 64 by 64 pixels."

Has anyone got some software that'll resize this for me please ? Thanks!

Thanks, but it's an animated gif file, when I re-save it, it's just a still frame gif :(

Animation Shop will do it

Email it to me and I'll resize it for you