Ray Creator is a program that can be used to create random images, such as the logo to the left. The program supports many different types of renders, including Target RGB, Greyscale, and Rainbow (the logo is a rainbow render). Download the program and give it a try with your own options. You'd be surprised at how good the images can look!
Current Version: 0.2.0 Alpha (10/24/2012)
Libraries/Engines used: Slick2D