Mats shared his method of aligning, and positioning all the LEDs on his clock in a perfect circle. He wrote an online PHP script that outputs Eagle commands that position, and rotate the LEDs depending on the parameters you enter into it.
I have written a php script that generates a bunch of moves and rotates to move parts in circles that I use when I want something spaced evenly in a circle. Enter parameters, hit submit, copy the code and paste into the command area in the board editor.
Via the comments.