Alright, I've done some surfing and I found five skins that I personally like (my favorite is Cobalt):
Ambience (have it)
Cobalt (still looking for it)
Applied (still looking)
Synapse (have it)
Mecka (have it)
The whole list of skins is available
here and
here. I still need to find Cobalt and Applied. I have the rest, so if you want to I can send them over.