Smartcash recently released one. Quite low entry too, despite the recent price hike. (about 6-7k usd to get one node)
I will invest on their coin. Masternode will be the future of miners no need to mine coins coz we are generating alot of electric supply. if you want to invest just look for Dash,Waves and XEM they are all good..
You should have a look into minexcoin its very profitable. I'm very sure you will like minexcoin