Image Placeholders
Posted by @fideloper
Super handy image placeholder generators:
http://placehold.it/ - Generates a placeholder with image dimensions shown.
Example usage: http://placehold.it/800x200, http://placehold.it/300x100
Another slightly less professional but definitely more awesome service is, naturally, http://placekitten.com/
Example usage: http://placekitten.com/800/200, http://placekitten.com/300/100.
Enjoy!