ImgRed is a free online image hosting service that allows indirect hotlinking wherein users can embed, redirect or link to images from someone else’s website.
To avoid hot-linking an image, prepend http://imgred.com/ before the URL. To show a thumbnail of the image, prepend http://imgred.com/tn/ before the URL.
While you increase traffic to ImgRed, you can avoid hotlinking images and eating up the original host’s bandwidth. Cool.