I don't do the best job of tracking every coin, and I haven't mined Skein myself. 

If it uses an algorithm supported by ccminer then you should be able to mine it with nvOC.  It most likely has a specific fork which performs better.  If you find me the link to the clients repo and tell me what pool you want to / do use to mine skein, then I can add the client and modify oneBash for the next version.