From the Authors site “SpriteLib GPL a collection of static and animated graphic objects (also commonly known as sprites). It was created to provide hobbyist game developers with an assortment of images to use in their creations. Because of SpriteLib GPL, developers don’t have to waste precious time or money creating graphics from scratch.”
I found the SpriteLib invaluable when I started learning to make games. I am not an artist, and concentrating on the code rather then trying to make good graphics saved me tonnes of time.
I wrote about Ari in another post which I also post a link to Ari origianl Spritelib.