CoinsHub - All your crypto trades synchronized with no hassle
Cryptominded - Where you learn more about cryptocurrencies
Bitcoin Flip - Trading Simulator for all the popular crypto currencies.
Crypto Buyer's Guide - Extensive cryptocurrency buying guide
CoinStats - CoinStats is a cryptocurrency research and portfolio tracker, that allows to access market data on over 3000 cryptocurrencies, track bitcoin and altcoin investments.
Robinhood - Free stock trading service.