RANDOM.ORG - RANDOM.ORG offers true random numbers to anyone on the Internet.
placeholder.pics - Lightest way to include placeholder images in your design
GeneratorMix - A place with hundreds of generators split into different categories from science to entertainment.
Fill Murray - Custom-sized placeholder images of Bill Murray
Random-Required - A random string generator that can take numbers, letters, symbols, Chinese characters and arbitrary...
PlaceKitten - Dead-easy placeholder images. Of kittens.