Not a 1-click currency exchange, but the calculator tool I've just co-developed is a neat way to keep track of all your cryptocurrency investments. The fact tha

Not a 1-click currency exchange, but the calculator tool I've just co-developed is a neat way to keep track of all your cryptocurrency investments. The fact that competition between the exchanges is wide open is obviously a great thing, so http://www.countmycrypto.com http://www.countmycrypto.com makes it easy to aggregate your total balance (and keep it in local storage) even if your different coins are split over multiple exchanges and offline wallets