Being that I mine on NiceHash with nVIDIA cards I can't use the auto-switching feature because the best nVIDIA mining tools (ccminer and cudaminer) don't support it. To that end, I've come up with a Windows Program,
Nice Hash Control which can start and stop mining apps based on which one is currently most profitable. Hope this helps, and please send a few mBTC my way if you find it useful.

BTW, the recent ccminer 1.2 release made for a nice bump in earnings on X11 and X13.

Screen shot above is what I'm getting with two GTX 750 Ti cards.
If someone could merge your apps with Bomba profitability Calculator and autoswitch to another coin on a watch list it would be awesome...!