Mad_line. What else could be used?
edited June 2013
What is another program that can easily make the outlines of items?
In the lastest version of Millumin, you can animate the border effect :
add a "Border" effect in Millumin, and play with the "line" parameters
use the brand new module called
create an animation "plug" to animate the "phase" property of your "Border" effect
Thanks, I'll give it a try.