CoinMarketCap - Crypto-currency market capitalizations.
Crypto Tracker - Never miss an opportunity to invest in bitcoins & ether
Coingecko - CoinGecko is a free to use web-based and mobile application that provides financial market data for more than 2000 digital currencies.
Cryptoradar - Find the best prices to buy or sell cryptocurrencies
Coinbase - Bitcoin, safe and easy.
Coinranking.com - A mobile-friendly list of cryptocurrencies.