Javascript Control For Animated Gifs
This is _quite_ cool: https://github.com/buzzfeed/libgif-js as it gives you a move_to(frame) for animated gifs. So now you can wrap up a lovely, hipster-parallax scroll locked page animation as a gif and roll it back & forth. SWEET. NB: Appears to work by first writing the gif images to a Canvas and grabbing the images from there, so it won't work well in ancient IEs.