Free original images to use as you want
Cupcake is maintained by Vincent Lejtzén, the creator of Random generator and consists of a gallery of photos taken by Jonas Wimmerström that are licensed under the Creative Commons license CC0.
It means that you are free to copy, modify, distribute and perform the work, even for commercial purposes, all without costs or asking for permission.
You're more than welcome to link back to Cupcake if you use any of the images. Enjoy!