Heres some that I called "ubuntumate plasma" I created these on Gimp 2..
3 are branded for UbuntuMate and the original one I created with no branding,
@Wimpy as with anything I create they are creative commons and free to use as you see fit. I'm going to work on some more with flames and fractals on my next day off.
If anybody is interested in having the gimp file I'll be happy to share it as well. Just pm me with your email and I will get it to you.
