Blockchain Demo - Visual demonstration of blockchain technology
Investing.com Cryptocurrency - One-stop-shop for those interested in cryptocurrencies.
Explain Me Please - Complex topics explained for your level and background
Poloniex - US-based cryptocurrency exchange with maximum security
Coinwink - Crypto alerts, watchlist and portfolio tracking app for Bitcoin, Ethereum, and other 3500+ crypto coins and tokens
Cryptoradar - Find the best prices to buy or sell cryptocurrencies